Characteristic Geometric Parameters Research Articles

Investigation on the influence of mesoscale geometric features on the surface white layer characteristics in titanium alloy milling using ball end mills

A white layer will be generated on the machined surface when milling titanium alloy. Its existence will make the surface of the workpiece more brittle, and it is easy to produce cracks during the machining process, which greatly harms machining. Aiming at this problem, this paper takes the ball-end milling cutter with mesoscopic geometric characteristics as the research object, establishes the theoretical model of the white layer thickness of the workpiece under the micro-texture and cutting edge factors, analyzes the single factor of micro-texture parameters and cutting edge parameters, and the interaction between them and cutting parameters on the milling force-thermal characteristics and the white layer of the workpiece. The influence law reveals its mechanism from the macro and micro perspectives. It uses the white layer thickness as the evaluation index to optimize the mesoscopic geometric characteristic parameters by using the simulated annealing algorithm. The results demonstrate that the mesoscopic geometric feature of the ball-end milling cutter effectively reduces the thickness of the white layer, achieving a 38% reduction compared to that observed with a non-textured milling cutter. The thickness of the white layer exhibits a positive correlation with the distance L from the blade and a negative correlation with the edge radius R. The interaction between the cutting edge radius R and the cutting depth a p influences the milling force and heat, alters the micro-texture of the workpiece surface, induces the α + β phase transformation, and affects the white layer thickness. Based on the predictive model for white layer thickness, the optimization results for comprehensive milling performance are as follows: R is 59.39 μm, L is 110.01 μm, D is 58.68 μm, L1 is 130.59 μm, a p is 0.30 mm, V is 147.39 mm/min, f is 0.08 mm/z.

Investigation of inter-subject variation in ultrafine particle deposition across human nasal airways: A study involving children, adults, and the elderly

The airflow and particle dynamics in adult nasal airways have been extensively investigated, but the impact of age-related anatomical changes in children and the elderly remains underexplored. This study systematically investigates age-related anatomical variations and associated influence on nasal airflow dynamics and ultrafine particle deposition characteristics by using Computational Fluid-Particle Dynamics (CFPD) approach. Numerical simulations were conducted for 9 healthy nasal subjects spanning a wide age range. 6 Nasal subjects from the Development Group were used as the primary models for data analysis and deposition correlation development, while 3 subjects from the Validation Group were used to validate the reliability of the derived total and subregional deposition correlations. Our results reveal distinctive variations across age groups. Specifically, the elderly and children exhibit unique patterns that differ from those of young adults. While total deposition efficiency differs significantly between children and adults, filtration efficiency in the subregion with most deposition, main respiratory, remains consistent. Lastly, overall and subregional empirical equations for deposition efficiency were developed by incorporating the combined diffusion parameter, Sca∆b, corroborating the use of geometrical characteristic parameters for each specific subject in predicting nasal deposition efficiency across different age groups. Our findings are expected to improve the predictive nanoparticle exposure analysis in nasal airways across different age groups, thereby improving the respiratory health for individuals throughout the life span.

ESTUDIO COMPARATIVO DEL FACTOR DE EMPAQUETAMIENTO MEDIANTE SOFTWARES DE ELEMENTOS DISCRETOS

This paper performs a study of the Packing Fraction (PF) in different commercial DEM (Discrete Element Method) software. For this purpose, the influence of different geometrical and particle characteristic parameters on the PF by filling a cylindrical container are analyzed. The simulation software used are DigiDEM, DigiPac and StarCCM+. Simulations are performed to compare the simulation time and verification of results; the influence of increasing the particle diameter in the same container, the influence of increasing the particle diameter and the container in proportion, the influence of increasing the h/d ratio in cylindrical particles "pellets" and the influence of decreasing the h/d ratio in cylindrical particles "disks".

Research on Computer Classification Algorithm of Concrete Crack Based on Deep Learning

In combination with transfer learning under the framework of Unet semantic partitioning, VGG16 pre-trained neural network enhanced encoder is used to extract multi-level high-level semantic information. The cross-entropy loss function is used to eliminate the imbalance between samples, and finally the crack shape is accurately semitone. Combining with the theory of computer vision, a quantitative calculation method of the crack region, length, width and other geometric characteristic parameters based on the binary segmentation template is proposed. Finally, the self-developed dam concrete crack image is taken as an example to carry out simulation and comparison test to check the correctness and superiority of the research results of this project. The research results will reveal that the crack recognition based on deep neural network can achieve a high recognition rate. The calculation results of fracture characteristic parameters meet the requirement of detection accuracy. The research results of this paper are expected to provide a new technical means for the quality control of dam concrete structure.

Evaluation of effect of spheroidization heat treatment on mechanical properties via small punch test

Due to the long time high temperature thermal action, pearlite heat-resistant steel 15CrMo is prone to pearlite spheroidization, which reduces its strength and makes it difficult to meet the actual service requirements. Therefore, quantifying the effect of pearlite spheroidization is an important factor in evaluating the high temperature performance of 15CrMo steel. In this study, the mechanical properties of 15CrMo steel were tested by uniaxial tension (UT), small punch tensile (SPT) test; the microstructure of 15CrMo steel after spheroidization heat treatment (SHT) was obtained by image processing technique to obtain the geometric characteristic parameters of pearlite spheroidization phase (PSP); the influence of spheroidization characteristics and properties were analyzed by mathematical and statistical analysis, and the results showed that the PSP size had the greatest influence on the properties; based on this, the linear relationship models between the spheroidization parameters and the mechanical properties of UT and SPT results were established with high accuracy of prediction.

Effect of laser texturing process on properties of composite coated cemented carbide ball-end milling cutter milling titanium alloy

To explore the strengthening mechanism of the laser texturing process on the surface of composite coating (AlCrN/AlTiSiN) cemented carbide and improve the application rate of laser texturing process in the field of tool cutting. Firstly, the influence of laser texturing process on the surface properties of composite coated cemented carbide was compared and analyzed. Secondly, a test platform for milling titanium alloy with composite coated cemented carbide ball-end milling cutters with different meso-geometry features parameters (blunt round edge radius and micro-texture distance from cutting edge) was built. Finally, the influence analysis and the optimization of geometric characteristic parameters were carried out with milling force, tool wear and workpiece surface roughness as dependent variables. It is concluded that the laser texturing process can significantly improve the phase structure of the composite coating and improve the quality of the coating. The influence of meso-geometry features on milling force, tool wear, and workpiece surface roughness and the parameter optimization of a single dependent variable are obtained by the milling test. Based on the genetic algorithm, the optimal meso-geometry features parameters of the carbide ball-end milling cutter are obtained, that is, the blunt round edge radius is 20.15 μm, and the micro-texture distance from cutting edge is 119.463 μm. It provides a practical basis for the application of laser-textured coating technology in the field of cutting tools.

Experimental and numerical study on buffeting force characteristics of the π -shaped bridge deck

In this study, a π-shaped main beam with typical geometric characteristic parameters was selected for conducting wind tunnel tests, and the characteristics of the buffeting force were measured. Based on the measured results, numerical expansion research was conducted using the narrowband synthetic random flow generation (NSRFG) turbulent inlet method, and a grid strategy was provided. By changing the geometric characteristic parameters of the π-shaped girder, a comparative study was conducted using proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) methods, revealing the influence of cross-sectional geometric characteristic parameters on the buffeting force characteristics and analyzing their mechanism of action. The results indicate that the inlet wind parameters of the NSRFG need to be adapted to the grid size. The grid filter size at the front end of the model should be smaller than 0.193 of the along-wind turbulence integral scale, which can then be used to solve for 80% of the turbulent kinetic energy. The smaller the aspect ratio is, the larger the buffeting force spectrum is, and the smaller the opening ratio is, the smaller the buffeting force spectrum is. The opening ratio strongly influences the buffeting lift spectrum, and the aspect ratio strongly influences the buffeting drag spectrum. The POD decomposition indicates that the geometric characteristic parameters affect the shape, strength, position, and direction of vortices at the section opening. DMD decomposition indicates that geometric feature parameters affect the frequency and growth rate of dominant modes as well as the directionality and regularity of vortex distribution.

Towards the optimal beam dump experiment to search for feebly interacting particles

Future searches for new physics beyond the Standard Model are without doubt in need of a diverse approach and experiments with complementary sensitivities to different types of classes of models. One of the directions that should be explored is feebly interacting particles (FIPs) with masses below the electroweak scale. The interest in FIPs has significantly increased in the last ten years. Searches for FIPs at colliders have intrinsic limitations in the region they may probe, significantly restricting exploration of the mass range mFIP<5-10\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$m_{\ ext {FIP}} < 5{-}10$$\\end{document} GeV/c2\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^2$$\\end{document}. Beam dump-like experiments, characterized by the possibility of extremely high luminosity at relatively high energies and the effective coverage of the production and decay acceptance, are the perfect option to generically explore the “coupling frontier” of the light FIPs. Several proposals for beam-dump detectors are currently being considered by CERN for implementation at the SPS ECN3 beam facility. In this paper, we analyse in depth how the characteristic geometric parameters of a beam dump experiment influence the signal yield. We apply an inclusive approach by considering the phenomenology of different types of FIPs. From the various production modes and kinematics, we demonstrate that the optimal layout that maximises the production and decay acceptance consists of a detector located on the beam-axis, at the shortest possible distance from the target defined by the systems required to suppress the beam-induced backgrounds.

Multi-track, multi-layer cladding layers of YCF102: An analytical and predictive investigation of geometric characteristics

This paper proposes a prediction method of the geometric characteristic parameters of cladding layers with multi-track and multi-layer. YCF102 cladding layers with different number of tracks and layers were laser cladded on the AISI 1045 steel substrate. The changing trend of the geometric characteristic parameters was analyzed by a laser microscope, and the prediction method of clad height, clad width and melt pool depth with the different number of tracks and layers under various processing parameters were proposed respectively. The results show that the increase of the number of tracks and layers lead to the increase of clad height, clad width and melt pool depth. When cladding the sixth layer, the clad width and melt pool depth still show an increasing trend, but the increase rate of melt pool depth slows down. The average residual values between the calculated and measured values of clad height, clad width and melt pool depth are 280.01 μm, 158.90 μm and 8.00 μm respectively, which are only 5.69%, 4.01% and 1.72% of the corresponding measured values. It is indicated that the prediction method is reasonable. The proposed prediction method can be used to predict the geometric characteristic parameters of multi-track and multi-layer cladding layers. The application of the method can effectively save the processing time and cost of the laser cladding repair of machine parts.

The resonance mode splitting rule of the rotating tire cavity considering the vertical load

According to the modal splitting theory of the tire cavity at different rotation speeds and the modal splitting theory of the tire cavity under different loads, the expression of the resonance frequency of the tire cavity of the rotating tire under load conditions is proposed. Based on the elastic contact theory, the characteristic geometric parameters of grounded tires are obtained. The resonance frequency of the tire cavity is predicted by using the common rule of the characteristic geometric parameters of grounded tires and the characteristic section parameters of the tire cavity, to further clarify the basic rule of changes of vibration mode shapes accompanied by the resonance mode splitting of the tire cavity.

A local approach for fracture analysis of sharp notches under Mode I loading

On the basis of the linear elastic notch stress fields, the local approach for fracture analysis of sharp notches under Mode I loading is proposed in this study. In the local approach, the stress concentration factor eigenvalue is introduced. For any sharp notch (V-notch), the geometric material characteristic parameters (GMPs) corresponding to the pointed V-notch are calculated by using an approach of determining the eigenvalue and models such as notch angle effect on the eigenvalue, notch depth effect on the eigenvalue and different material effect on the eigenvalue. It is seen from this study that fracture analysis for the sharp notches is well performed by using the obtained GMPs and the local stress field failure model proposed in this paper with a high accuracy within an error interval of a few percent. Taking into account that the fracture toughness is unknown at some circumstances, an empirical equation of determining is proposed in this study. By using the empirical equation, the local approach proposed in this study has a wide of applications such as fracture analysis of the rounded-tip V-notched Brazilian disc (RV-BD) specimens and fracture analysis of center circular hole plates made of metallic materials.

Mixed-mode loading tests for determining the mechanical properties of clinched joints with an additional rivet used in the assembly of thin-walled structures

This publication presents the possibility of forming a clinched joint with the use of a deformable element such as a full rivet. An analysis of the joint load capacity was also performed for three values of the hardness of the rivet. The joints were formed in the same sheet with thickness t=1.5 [mm] made of DX51D+Z275 steel (which is commonly used for thin-walled structures). Additional rivets with hardness values 350HV1, 400HV1, and 420HV1 were used. The joints were made with a uniform punch and a die with movable elements. Load capacity tests were carried out in order to demonstrate the influence of the angle between the load force and the axis of the clinch riveted joint. H-shaped samples were made for load tests with the use of a modified Arcan test device. All joints were tested under the same static test conditions (the traverse speed of the testing machine was 10 mm/min). In addition, the characteristic geometric parameters of the interlock were measured on the joint cross-sections.In the case of connecting the sheets with a rivet of three different hardnesses: 350HV1, 400HV1, and 420HV1, the largest surface deviations of the sheets were observed for the connection with the 350HV1 rivet hardness. Increasing the hardness of the rivet from 350HV1 to 400HV1 and 420HV1 resulted in a reduction in sheet deviations. The deviations for the largest distance from the rivet axis in the case of the 400HV1 and 420HV1 rivet hardness were at a similar level. The highest value of the interlock parameter, which determines the joint load capacity, was obtained for the rivet with the highest hardness value (420HV1). The highest joint load capacity was obtained when using a rivet with a hardness of 420HV1 and the lowest for the rivet hardness of 350HV1.

ANALYSIS OF THE GRAPHITE PHASE IN CENTRIFUGED BILLIONS MADE OF HIGH-QUALITY CAST IRON

Purpose. To determine the characteristic geometric parameters of spherical graphite inclusions in the cross-section of a cast iron billet for piston rings.&#x0D; Research methods. A cylindrical blank for piston rings was obtained by the centrifugal method. The chemical composition of the blank according to the ВЧ 500-2 brand (DSTU 3925-99). To obtain spherical graphite, nickel-magnesium ligature (15 % Mg) and secondary graphitizing modification with ferrosilicobarium ФС65Ба4 were used. The amount of each additive was 1.0 % of the metal mass. Spherical graphite was evaluated according to GOST 3443 and several characteristic geometric parameters. A computer image analyzer based on a “ZEISS Epityp-2” microscope with a digital video camera “Baumer” was used.&#x0D; Results. The geometric parameters of graphite inclusions in the cross-section of a centrifugal billet made of high-strength cast iron are examined. A significant difference in the geometric parameters of spherical inclusions of graphite according to several size groups formed in different layers of the cast iron billet obtained by centrifugal casting was established.&#x0D; Scientific novelty. Spherical graphite inclusions in the oil billet are classified according to 6 size groups of GOST 3443 and 11 size groups built in arithmetic progression. Significant differences between the outer and central layers of the casting were established: 2.14 times – by the number of small (5...10 μm) inclusions; 1.59 times – by the number of inclusions with a size of 10...15 μm, 1.4 times – by the number of inclusions with a size of 20...25 μm; 3.9 times – by the number of large (more than 35 μm inclusions).&#x0D; Practical value. A comparative assessment of the morphology of spherical graphite in the outer, central and inner layers of the centered workpiece will allow to improve the technological parameters of the production of cast piston rings in order to ensure a high resource of engines or compressors.

Migration of Leaked Oil Vapor in Underground Water-Sealed Oil Storage Cavern Considering the Influence of Fractures

During the operation of underground water-sealed oil storage caverns, a large amount of oil vapor is generated due to volatilization. Oil vapor can easily leak into the surrounding rock, and fractures in the surrounding rock are usually the dominant channels for oil vapor leakage. To study the influence of fractures on oil vapor leakage and migration in underground water-sealed oil storage caverns during the oil storage period, a gas–liquid two-phase flow model of the fracture–pore dual medium in fractured rock mass was established. The program was implemented on the COMSOL platform by using weak-form PDE (partial differential equation). Then, taking an underground water-sealed cavern of an oil reserve as an example, the influence of the characteristic parameters of a single fracture on the evolution process of oil vapor leakage and migration during the oil storage period of the underground water-sealed oil storage cavern was studied. The results were further applied to the Huangdao underground oil depot project. The results show that the spatial distribution of oil vapor leakage is mainly affected by fractures. Through parameter sensitivity analysis, it was found that the geometric characteristic parameters of fractures will have a certain impact on the migration field of oil vapor leakage in underground caverns. Specifically, fracture permeability (kf), fracture width (df), and fracture inclination (θ) are positively correlated with oil vapor leakage parameters (oil vapor leakage range and leakage volume), while the distance between the fracture and the middle cavern (s) is negatively correlated with oil vapor leakage parameters (oil vapor leakage range and leakage volume). The relative influence of fracture geometry parameters on the migration process of oil vapor leakage during the oil storage period of the underground water-sealed oil storage cavern is in the following order: kf&gt; df&gt; s &gt; θ. Engineering application shows that the existence of fractures affects the spatial distribution of oil vapor leakage and migration, and the relationship between oil vapor leakage parameters and oil storage operation time is a positive power function. The gas–liquid two-phase flow model of the fracture–pore dual medium in fractured rock mass developed in this study could offer a numerical simulation tool to assess and mitigate the risk of oil vapor leakage. The research conclusions can provide some references for related problems encountered in similar projects.

Perimeter Calculation of Irregular Shapes Based on the Method of Translating Line Segments

Through image processing technology, programmers use instructions on a computer to identify the composition diagram of various molds. The automatic identification system device on the production line will identify whether the molds produced are qualified according to preset instructions, eliminating unqualified molds, fully realizing industrial testing automation, and quickly and accurately eliminating unqualified molds. This not only saves labor costs, but also avoids the subjectivity of manual testing. This paper proposes a method based on translation line segments to calculate the perimeter of irregular shapes. Translation refers to the movement of objects along a straight line in the same plane. This phenomenon is common in everyday life, such as children playing on slides in amusement parks, and the moving elevators of six supermarkets ascending or descending. Calculate the geometric feature parameters of the image area using the translation line segment method. According to the different appearance characteristics of the product, take photos of it from different angles and perform image processing, and comprehensively determine the required geometric feature parameter values. Calculate the geometric characteristic parameters of the product, and then compare them with the standard specifications. Conduct alarm marking processing for products that do not meet the requirements, facilitating manual removal.

Study on coalbed methane flow characteristics based on fractal bifurcation fracture network model

The geometric structure and distribution of the fracture network significantly impact the coalbed methane flow characteristics. The indoor optical microscope test is utilized to analyze the distribution and structural characteristics of natural fractures in coal. The results indicate that the fracture network in coal consists primarily of irregular bifurcated fractures, but the influence of the bifurcation fracture network’s structural characteristics on permeability remains unclear. Therefore, the fracture network geometric structure characteristic parameters are considered in accordance with the fractal theory, and the analytical formula of the bifurcation fracture network permeability is established. Meanwhile, the bifurcation fracture network geometric model with varied structural parameters is reconstructed using the pixel probability decomposition algorithm. Finally, the influence of the key parameters of the reconstructed bifurcation fracture network on the coal seam permeability is analyzed through numerical simulation. The results indicate that the permeability of the bifurcated fracture network increases with the increase of fracture porosity φf, aperture ratio χ, and proportionality coefficient η, and decreases with the increase of tortuosity fractal dimension DT, bifurcation angle θ, fractal dimension Df, and bifurcation level n. Among them, fracture porosity and proportionality coefficient have the greatest influence on permeability, followed by tortuosity fractal dimension, aperture ratio.

Study on the Influence of Typical Land Use Type Change on Soil Erosion Resistance in Northeast Black Soil Region

This paper explores the soil anti-scourability characteristics of land use types in the northeast black soil region, takes the surface soil (0-10 cm) of three main land use types (including natural grassland, sylphus pine plantation and cultivated land) in the typical black soil region as the research object, analyzes the difference of soil anti-scourability coefficient of different land use types, and defines the influence of soil physical and chemical properties and root characteristics on soil anti-scourability. Identify the key factors affecting soil scourability. The results showed that: (1) the soil loss under different land use types changed sharply in the first 2 min of scour, and gradually stabilized with the extension of scour time; On the whole, the soil loss of natural grassland was the smallest, while that of cultivated land was the largest. (2) The soil scourability of different land use types was as follows: natural grassland &gt; plantation forest &gt; cultivated land; Compared with the cultivated land after reclamation, the soil anti-scour property of Pinus sylvestris plantation was significantly improved, and the soil loss was significantly reduced. (3) The geometric characteristic parameters of roots of natural grassland and Pinus sylvestris plantation were significantly higher than those of cultivated vegetation, and the root volume density had the greatest effect on soil anti-scour coefficient. The effects of different diameter classes of fine roots on soil scourability of three land use types were as follows: 1.5-2 mm&gt;1-1.5 mm&gt;0.5-1 mm&gt;0-0.5 mm. This study can provide a theoretical basis for evaluating the soil consolidation and water conservation ability of vegetation in northeast black soil region.

Разработка тепловой изоляции с упорядоченной структурой, основанной на ТПМП Неовиуса

Currently, materials with a random pore arrangement are mainly used as thermal insulation. Such materials, as a rule, have low strength. To solve a number of structural tasks, a heat-insulating material with a high specific strength is required.To date, for these purposes sandwich panels with layers of honeycomb cells filled with air are applied. In this regard, the current goal is to develop more efficient materials with an ordered structure, which will have greater thermal resistance and strength. For numerical simulation of thermal conductivity in a porous material with an ordered structure, the Steady-State Thermal module of the ANSYS software package has been used. Polymers that are often used in 3D printing, such as PETG plastic and Phrozen photopolymer, are chosen as materials for a porous medium with the Neovius TFMT structure. As a result of the study of thermal conductivity in an elementary cell of the Neovius surface in the ANSYS software package, the values of the effective thermal conductivity coefficient are obtained for various characteristic of geometric parameters (cell wall thickness, length of the edge of the cube in which the cell of the Neovius surface is inscribed). Based on the results obtained, it has been found that the dependence of the coefficient of effective thermal conductivity on the cell wall thickness (as well as on the relative cell thickness) is linear. It has been also determined that the geometry under study has a quasi-isotropic thermal conductivity, since it has cubic symmetry. Based on these results, the corresponding graphical and analytical dependencies are designed. The developed heat-insulating material with an ordered structure based on Neovius TPMT is proposed to be used as thermal insulation. The obtained graphical and analytical dependences make it possible to determine the coefficient of effective thermal conductivity of a material with a structure based on the Neovius TFMT with known characteristic geometric parameters (cell wall thickness, cube edge length). The results obtained can be used to design thermal insulation for several tasks when, in addition to thermal insulation properties, structural strength is also important. The porous structure can be produced using modern 3D printing methods, such as selective laser sintering (SLS), laser stereolithography (SLA), etc.

Investigation of Local Tsunami Effect on Coastal Areas: A Case Study of Putian City, Fujian Province, China

In this paper, we explored the local tsunami hazards induced by an active local seismic Quanzhou fault, along the coastlines of the City of Putian, Fujian Province, in the southeast of China. The simulation results indicated that the tsunami wave will hit the nearest coast of Putian 0.5 h after the earthquake occurs. The most serious tsunami inundation depth in Putian was less than 3.0 m. This study also conducted a sensitivity test of the tsunami amplitude and inundation in response to different seismic source parameters, particularly the rake and strike angles of the Quanzhou fault. Based on the post-earthquake survey and the most updated geophysical data, the uniform dislocation distribution is applied in the range of scientific geometrical characteristic parameters for numerical modeling. A 20° change in the rake angle increases the inundation area from 50.0 km2 to more than 100.0 km2, and increases the tsunami amplitude from 0.2 m to 1.0 m. In this study, the tsunami hazard of Putian is more sensitive to the rake than to the strike angle for a local fault. Tsunamis generated by seismic fault could also result in serious coastal flooding along the coastlines locally, and the time for emergency response is limited. The research results could provide technical support for refining local tsunami hazard assessment and contingency plans, to save decision-making time and avoid waste of social resources.

Energy and exergy analysis of microchannel central solar receivers for pressurised fluids

Within the new generation of advanced central solar receivers, microchannel pressurised gas receivers are emerging as reliable and efficient alternatives to operate at high temperatures and pressures. This paper presents an optimisation and comparative analysis of different compact plate-fin type structures, constituting the receiver’s absorber panels, classified according to the type of fin arrangement inside: plain rectangular, plain triangular, wavy, offset strip, perforated, and louvred fin. A versatile thermo-fluid receiver model is implemented, allowing simple variation of characteristic geometric parameters of each structure. Exergy efficiency is chosen as the optimisation function, as it considers both heat and pressure losses.The framework of the analysis is set by the receiver’s boundary conditions, operating at the design point conditions of a solar thermal power plant. For each compact structure, the optimal configuration is determined, providing interesting findings that have not been reported in the state-of-the-art to date. Although all geometries show good thermal performance, the perforated and plain rectangular configurations demonstrate the best exergy efficiencies of 59.21% and 58.80%, respectively, favouring taller and narrower channels. This analysis methodology could be seamlessly extrapolated to other gases and working conditions, owing to the thermo-fluid model’s versatility, to reveal the optimal configuration for each case.