Fluent Analysis Research Articles

Research on formation mechanism and output effect of wind turbine ice-covered blades

Considering the physical characteristics of wind turbine wing icing, icing synthesis rate, and icing type, we selected the icing type and surface roughness of ice-coated blades as sensitive parameters. The focus of our research was on the equivalent particle roughness height correction model, and we numerically analyzed the two icing processes (frost ice and clear ice) on wind turbine blade surfaces by combining FENSAP-ICE and FLUENT analysis tools. We predicted the ice type on blade surfaces using a multi-time step method and analyzed how variations in icing shape and ice surface roughness affect the aerodynamic performance of blades during frost ice formation or clear ice formation. Our results indicate that differences in blade surface roughness and heat flux lead to disparities in both ice formation rate and shape between frost ice and clear ice. Clear ice has a greater impact on aerodynamics compared to frost ice, while frost ice is significantly influenced by the roughness of its icy surface. These findings can serve as valuable references for wind power operators and manufacturers seeking solutions to issues related to blade surface icing under extremely cold conditions.

Influence of Different Wingtip Devices on Aerodynamic Characteristics of UAV

The wingtip device plays an important role in increasing the range of UAVs because the winglets can effectively reduce the induced drag. The purpose of this paper is to explore the influence of wingtip device parameters on the lift-to-drag ratio of UAVs. Using the Fluent analysis system, the drag reduction performance of the winglet-winglet structure based on a UAV was analyzed at different angles of attack. Firstly, from the perspective of aerodynamic performance, the optimal cant and sweep angles of the blended winglets were selected by simulations. Then, the best-blended winglet and the blended split were simulated and analyzed, and the difference between the two on the lift-to-drag ratio and the flow field around the wing were compared. Compared with the traditional wind tunnel test, the CFD technology used greatly shortens the research cost and experimental cycle and provides help for the design of the UAV wingtip work.

Numerical model and experimental research of a new two-tier micro-flame combustor for gas turbines

The study of a novel two-tier micro-flame combustor for gas turbines involved comprehensive modelling using SolidWorks and ANSYS FLUENT software pack?ages, alongside physical experiments. Analysis of air-flow velocities, pressures, temperatures within the combustion chamber, and NOx emissions led to several key findings. The SolidWorks modelling confirmed stabilized air-flow and uniform pressure distribution, enhancing fuel combustion. Optimal air-flow velocities (15 m/s and 30 m/s) for different operating modes were determined, highlighting the importance of air-flow regulation. The ANSYS FLUENT analysis revealed efficient mixing of the fuel-air mixture through the device?s two tiers. The analysis of NOx emissions confirmed compliance with regulatory standards, up to 15 ppm. These results underscore the efficiency and stability of the combustor, making a signifi?cant contribution the advancement of gas turbines while meeting requirements for efficiency and environmental safety.

A new design method for the vortex hydrogen circulating pump system

Against the backdrop of “carbon peak and carbon neutrality,” the hydrogen and fuel cell vehicle industry are rapidly developing. Within the on-board hydrogen supply system, the hydrogen circulation pump serves as an essential component of the hydrogen fuel cell system. The spiral disk, as a core part of the hydrogen fuel cell system’s vortex hydrogen circulation pump (VHCP), plays a crucial role in determining the performance of the hydrogen circulation system in hydrogen fuel cell vehicles. To meet the requirements for high-performance and high-reliability development of the hydrogen circulation pump, the VHCP scheme is adopted as the choice for the hydrogen pump solution. Through the magnetic suspension and no connection shaft structural design, the feasibility of applying the high speed and high flow hydrogen turbine was initially validated. Utilizing Fluent analysis software and high precision performance test bench, a comprehensive three-dimensional numerical simulation of the turbine design under various operating conditions was conducted and performance test verification, demonstrating that the performance meets the required specifications. By conducting research in both strength optimization design and performance requirement, two major technical challenges in turbine pump application were overcome. Combined with the experimental results of the turbine medium, it is concluded that the vortex pump can meet the flow and pressure rise under the premise of low power consumption in the hydrogen circulation system so as to perfectly increase the hydrogen return amount. Based on these findings, recommendations are proposed for the future development direction of hydrogen supply systems in hydrogen fuel cell vehicles.

GE 1.5 XLE Wind Turbine Blade Analysis with Computational Methods for Various Composite Materials

The purpose of this paper is to investigate various composite materials that have been applied in wind turbine blades.Α computational study on a GE 1.5 XLE wind turbine blade with different composite materials was performed. The computational evaluations from the fluent analysis have been used in order to calculate the equivalent (Von-Mises) stress, shear stress, and displacements of a wind turbine blade. The proposed study results in useful and interesting conclusions for the stress and displacement fields that arise in blades with different materials and under different loading conditions.

Investigation of Airfoil Design and Analysis

Abstract: In this project “Aerofoil Design and Analysis” an attempt has made to make a complete study on lift and drag coefficient of various aerofoil sections using CFD. The primary goal of this project is to learn and analyse the aerodynamic performance of wings. The objective of this study is to improve aerofoil design using the software CATIA, And Fluent Analysis using the software ANSYS. Aerofoil is a principal part of any airplane construction. How much lift force and drag force is sufficient to balance the weight of the plane is decided by the aerofoil. Aerofoils are basically divided into two categories - they are Asymmetrical and Symmetrical aerofoils. Based on their drag and lift coefficient’s variation with angle of attack, stall angle of attack and magnitude of the coefficients they are divided. Here the NACA aerofoil is modified by adding dimples on the upper half of the wing and compared with the simple one. The comparison is made on different speed and pressure on the wing and the coefficient of lift and drag.

Interstate investment legal treatment as a factor of investment attractiveness

The theses are devoted to one of the key components of international investment agreements – investment legal treatment, since an even fluent analysis of international investment arbitrations with participation of states and subjects of economic activity with investments from abroad delivers understanding that standards and guarantees of investment legal treatments have fundamental character at least for the mentioned legal practices. Kind of argument for this could be found in a position of agreed provisions of investment treatments at bilateral investment treaties, which usually follows introduction norms for investment permitting and admitting, being set from the very beginning of such treaties. But, is this fundamental character of investment legal treatments being remained in other important rules of international investment implementation? Scientific questions about corresponding dualism are likely the key at these theses, because the concept of investment legal treatment is quite deeply studied in the framework of international law and general law theories, but leaves a number of insufficiently disclosed scientific and practical issues regarding the specifics of this concept in certain branches, including international investment law in the first place. The analysis defines main practical problems of international investment law, including the legal protection of international investment and the delimitation of actions of states that constitute expropriation or the measures taken by states under the right to regulate within public interest. Separate researching attention also paid to legal interaction between the concepts of the investment legal treatment as legal instrument of an international lawyer, and the state guarantees for the protection of foreign investment – as remedy and element of specialist in domestic law practices. Provided research significates investment legal treatment importance as a factor of local investment attractiveness, it also outlines importance of development of state guarantees for protection of foreign investments by delivering progressive European approaches as the examples, focusing on effective balance reaching within the corresponding regulation. Scientific and practical conclusions on the most important legal sources in the field of international investment activities are made, the direction for the next stage of researching work is preoutlined. Key words: international investment law, international investments, investment legal treatment, bilateral investment treaties, international investment arbitration, state guarantees for the protection of foreign investments.

The CFD Application in Analyzing The 024P108 Centrifugal Pump Damage as The Effect of High Vibration using Fluid Flow Discharge Capacity Parameters

Petroleum is one of the natural resources that can produce energy both for fuel and for generating electricity. One of the most important and widely used equipment in this industry is a pump. A pump is a device for distributing fluids from one place to another. A centrifugal pump is a device for distributing move liquids from one place to another by converting the fluid's kinetic energy into potential energy through an impeller that rotates in the housing. The objective of this research is to analyze the damage of pump 024P108, which indicated high vibration due to using a high-speed shaft. The research is done by using an analytical method, using CFD Fluent analysis with flow discharge capacity under normal conditions and minimum flow conditions, and comparing the results by API 610. Afterward, the right maintenance will be known for the 024P108 centrifugal pump to reduce the high vibration that occurred in the pump. The pump is run at minimum flow with a flow rate of 22 m3/hr and the normal flow rate of the pump is 97.9 m3/hr so that the results show that the pump head has decreased to 198.74 m and the pressure drop has increased by 2.5995×105 Pa. The vibration test data shows that high vibration of 8.5 mm/s is produced by a minimum flow state of 22 m3/hr, this low fluid flow is the cause of high vibration on the pump. High vibration has an impact on pump performance, that is decreasing pump performance (efficiency) and if left continuously it can cause damage to the pump.

Thermal control of crystalline silicon photovoltaic (c-Si PV) module using Docosane phase change material (PCM) for improved performance

As crystalline silicon photovoltaic (c-Si PV) module demonstrates circa 0.45% drop in conversion efficiency for every 1 °C cell temperature rise above 25 °C standard test condition (STC), thermal control of the system is critical to improving its efficiency especially for elevated temperature climate deployment. This research demonstrates the utilisation of Docosane C22H46 paraffin wax phase change material (PCM) to lower the operating temperature of c-Si PV module operating in hot climatic conditions. Employing computational fluid flow fluent analysis in Ansys software package, the thermal responses of finite element (FE) models of the module to environmentally induced loads are simulated for 24-hour period. The results are validated analytically. Findings reveal that temperature difference between ambient and solar cell is maximum at noon at 23.7 °C and monotonically decreases afterwards to zero at 6.00 am and 8.00 pm. The implementation of PCM delivers a PV-PCM module that is 10.88% more conversion efficient than the conventional c-Si PV module. Further findings show the improved efficiency results from PV-PCM module achieving cell temperature reduction of 78.4% at peak heat flux and 31.1% overall. The PV-PCM module produces 6.1% more voltage, 2.1% more electric power and 8.1% more maximum power daily than the conventional c-Si PV module. In addition, it is found to be 1.05% more efficient and has 34.0% longer fatigue life. The PCM usage demonstrates effectiveness in control of thermal characteristics of c-Si PV module by improving its performance – crucial for its reliable operations in hot climates.

Modelling and analysis of aircraft radome using different materials

Radome is one of the most important part in aircraft. Radome protects the antenna which transmits and receives the signal in the form of radio waves. These radio waves are helpful in finding the location of aircraft. We can also say that radome is a structural protection cover for antenna as it protect antenna from environmental influences. Radome is constructed in such a way that it is transparent to the radio waves. The radome should be manufactured by a material which minimises the attenuation of signals transmitted or received by the antenna. For different aircrafts such as commercial planes, fighter jets etc. The shape and size of radome are different. In this project we have modelled different radomes in solid works software and analysis is done in the ansys software. The materials selected based on the strength and other good material properties. The different materials taken in this project are Kevlar composite, Fiberglass composite, Silicon nitride. Structural analysis and fluent analysis is performed to get the optimum suited material for the radome and to decide the best radome.

Semi-analytical model for the heat conduction resistance of a single spherical condensate droplet

The evolution and heat transfer of a single spherical condensate droplet on a superhydrophobic surface (SHS) can be modeled by the droplet thermal resistance network. The calculation of the heat conduction resistance of a single spherical condensate droplet (Rd) is a fundamental problem in analyzing the droplet thermal resistance network. Till now, the majority of researchers have used Kim's formula to calculate Rd. However, the results from Kim's formula have errors above 85% compared to those from the CFD software (ANSYS Fluent). In this paper, we analyze the reason for inaccuracy of Kim's formula. Taking two-dimensional droplet heat conduction into consideration, we gain the theoretical temperature field function inside the condensate droplet by utilizing the conformal mapping. Basing on calculation of heat transfer rate through the droplet and ANSYS Fluent analysis, we put forward a new semi-analytical model to calculate Rd. We verify and find that the results from our new model have errors less than 13% compared to those from ANSYS Fluent. It means that our new semi-analytical model is more accurate than Kim's formula. We calculate the Rd proportion of the overall heat transfer resistance and find that the application of our model can obviously decrease heat transfer calculation errors for big droplets (r>16μm) with large contact angles (θ>120∘). The new semi-analytical model for the heat conduction resistance of a single spherical condensate droplet is promising in the sense that it might replace Kim's model to become a novel design criterion of enhanced heat transfer SHSs.

Aerodynamic Analysis of Novel Savonius Rotor

Abstract: Wind is a renewable form of energy that holds vital solutions to energy crisis that will be faced in the possible future. Apart from the viable lift based turbines that we have been working on, research can be done on drag based turbines that can be installed in urban areas for short power requirements. The research aims at developing a novel design for Savonius type rotor which will help to improve the power producing characteristics of the turbine. CFD fluent analysis will help in analysis of the proposed blade shape. The results explain how the combination of elliptical profiled blade improves coefficient of power for Savonius type rotor. Keywords: Aerodynamics, Wind Energy, Savonius, VAWT, Wind Turbine

Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre

The vacuum infusion method is emerging to produce composite parts, especially thin wall structure aircraft radome. Ansys Fluent is used in the optimization phase for mould filling analysis on aircraft radome part. The permeability fibre is referring to the physical property of the fibre reinforcement to allow fluids to permeate it, thus it is correlated with the viscosity of the resin used. In this work, flax fibre, glass fibre and low viscosity epoxy resin are used to determine the permeability value of flax fibre, glass fibre and hybrid without using a flow medium. In-plane experiment on reinforcement fibre permeability is conducted and all reinforcement fibre have similar fibre architecture and weight. The development of a digital model from a top partial aircraft radome is obtained through a 3D scanner and CATIA. Ansys Fluent is used to optimize the location of the injection line and air vent for the epoxy. The Ansys Fluent analysis model is validated through the in-plane experiment filling time result for a flat model. Based on the simulation analysis, the location of the injection line is placed at the perimeter and the air vent at the centre. The filling time from the simulation for the flax fibre and hybrid fibre was estimated around 10 to 11 minutes. However, the filling time for glass fibre is approximate 2 hours which is longer than epoxy gel time. Furthermore, this method can be used in mould filing scenarios of thin wall structure within gel time of the resin.

Numerical study on the flow characteristics of slot cooling header after rolling

In order to study the flow distribution characteristics of the slot cooling header after hot rolling, and the influence of different structure and technological parameters on the flow uniformity of outlet velocity and length direction was obtained. The three-dimensional steady-state numerical simulation analysis of the flow inside the manifold was carried out by FLUENT analysis software. The influences of inlet pressure, shape and structure of intermediate transition cavity were studied respectively. The results show that within the range of 0.1~ 0.5MPa of the inlet pressure, the velocity fluctuation in the direction of the outlet length increases with the increase of the pressure, and the width decreases from the middle of the gap to both sides. The flow velocity at the jet outlet can be increased by changing the angle of outflow tilt of the water supply pipe.

Topology Optimization Design of a Microchannel Plate Based on Velocity Distribution

AbstractVelocity distribution plays an important role in the performance of microchannel devices. However, traditional microchannel plate design processes are based on experience with the existing models, which limits the ability to achieve optimal performance. Here, topology optimization is introduced into microchannel plate design, achieving a new microchannel plate with lower power dissipation and more uniform velocity distribution. A detailed design procedure was performed and an ANSYS Fluent analysis was carried out to further confirm the accuracy.

AERODYNAMIC STUDY OF SLOTTED FLAP FOR NACA 24012 AIRFOIL BY DYNAMIC MESH TECHNIQUES AND VISUALIZATION FLOW

Slotted flap is one of high lift devices. It considered as a moving part of the airfoil which is used as a control instrument in a form of elevator, rudders and ailerons. The main focus of work is to investigate the effect of flap chord, gap and overlap on aerodynamic characteristic of NACA 24012 airfoil. The model was tested with 20% C, 30% C and 40% C single slotted flaps at zero angle of attack. The dynamic mesh and user defined function is applied to control the flap distance with respect to wing at any position. The simulation was done by solving the governing equations (Continuity, Reynolds Averaging Naveir- Stokes and Energy Equation) in 2-D using Fluent analysis at Reynolds number of 3.1x〖10〗^6. Based on the results presented, larger increment of lift coefficient is obtained with the larger flap chord, but this increase is accompanied by a drag penalty. Furthermore, the loss of lift coefficient associated with larger extending flap at 3% C had a very detrimental effect on the attainable lift coefficient. The simulation result also shows that an optimum gap is 1% C in order to derive the maximum lift capability from the flap model. The code is validated against field measurements to show how close the CFD model simulates the reality.

Dielectric Fluid Parameter Optimization in Machining of Composite Material using WEDM Process

Wire Electric Discharge Machining (WEDM) has become most popular among the non-conventional machining processes because of precise machining and accuracy of parts. The process is preferable for accurate machining of complex geometries in hard materials such as Aluminium Silicon Carbide metal matrix composite. In this work, an attempt is made to analyze and optimize the dielectric fluid parameters in machining of Al/SiCp 10% work material. The input variables such as volume flow rate, flow velocity and chemical composition of dielectric medium used in the WEDM are chosen for this. Taguchi’s L9 orthogonal array is used to conduct experiments in WEDM machine and ANOVA results have confirmed the influence of chosen parameters on the output responses. Computer simulation model of the WEDM tank with dielectric fluid, work piece and nozzle is presented using Fluent software. The Fluent model is analyzed based on the maximum removal of debris in the work material. Optimization is carried out to maximize the Material Removal Rate (MRR) and minimize surface roughness. The results obtained from Taguchi’s optimization and Fluent analysis have been validated by carrying out tests on WEDM. The study shows that volume flow rate and flow pressure can adequately influence MRR and surface roughness.

Experimental Analysis of Pin- Fin By Varying Geometry and Material

This paper aims to investigate the performance of fin effectiveness, efficiency and to improve the heat dissipation characteristics by varying fin geometries and materials. Here the system flows natural convection and forced convection heat transfer. The greatest ‘h’ value will be acquired at a specific point by changing the velocity of the fluid. Acquiring maximum efficiency and effectiveness of the pin-fin apparatus can be accomplished at a specific temperature. In this cross-section area of fins are considered as constant. The heat conveyed along the length of the fin, Reynolds number, Nusselts number, Heat Transfer coefficient, Effectiveness and Efficiency of the fins were evaluated and compared with the fluid fluent (CFD) analysis.

Hava Soğutmalı PVT Panellerde Panel Yüzey Sıcaklığını Etkileyen Kontrol Parametrelerinin Optimizasyonu

Panel yüzey sıcaklığı PV panelin performans parametreleri üzerinde çok önemli etkiye sahiptir. Özellikle yaz aylarında görülen panel yüzey sıcaklığındaki aşırı yükselme panel veriminde ciddi düşüşlere neden olur. Bu olumsuz durum panel yüzeyi soğutularak minimize edilebilir. Bu çalışmada, hava soğutmalı PVT sistemine kanatçıklar eklendi. Kontrol parametrelerinin (panelin arka yüzey sıcaklığı, fan hızı, kanal derinliği, kanatçık konfigürasyonu, kanatçık malzemesi) panel yüzey sıcaklığına, kanatçık sıcaklığına ve çıkış sıcaklığına etkisi Taguchi Yöntemi kullanılarak incelendi ve en uygun tasarım kombinasyonu belirlendi. Ayrıca ANSYS FLUENT analizi ile elde edilen görüntüler analiz edildi. Çalışmamızda monokristal panel kullanıldı. Bakır, alüminyum ve pirinç malzemelerden yapılmış kanatçıkların sık ve seyrek konfigürasyonları için deneyler yapıldı. Panel yüzey sıcaklığı, kanatçık sıcaklığı ve çıkış sıcaklığı için en etkili parametrelerin kanatçık konfigürasyonu, fan hızı ve kanal derinliği olduğu görüldü. Optimal tasarım kombinasyonu, panel yüzey sıcaklığı için A2-B3-C2-D3-E2 olduğu, kanatçık sıcaklığı için A1-B1-C3-D2-E2 olduğu, çıkış sıcaklığı için A1-B1-C3-D2-E3 olduğu bulundu.

Design and Development of Rukma Vimana Nozzle

Rukma vimana is a part extraction from vimana Shastra. This project deals with nozzle system of ancient rukma vimana for vertical take-off systems. Nozzle design is very important to provide the necessary lift to the vimana. In the vimana Shastra a provision has been identified to create external heat supply to the streamed flow system in nozzle. In the present work external heat is applied to the nozzle section and to estimate the coefficient of lift. An attempt is being made to create CAD modelling and perform ANSYS fluent analysis to validate theoretical correlations. Keywords: Bumper, dynamic and modal analysis,