High-speed Photography Research Articles

Effects of delay time on crack coalescence between two boreholes

Delayed detonation widely occurs in rock blasting, which has a significant influence on the propagation and interaction of explosion-induced stress waves. This affects the rock fracture interconnection between adjacent boreholes in controlled blasting. In this study, the effects of delay time on crack coalescence between two blastholes in contour blasting are experimentally, theoretically and numerically investigated. The rock cracking in two-hole blasting on 200 × 200 × 50 mm granite plate is first experimentally examined, in which the delay time is determined by high-speed photography and the rock fracturing is identified by digital image correlation. Then, two-hole blasting with delayed initiation is analytically modelled, and the fracture propagation behaviours in blast tests are explained based on the evolution of explosion-generated stress waves and peak stress distribution between two holes. Subsequently, 3D finite element models are built in LS-DYNA to simulate the evolution of explosion-produced pressure, rock fracturing and energy dissipation in two-hole controlled blasting with delayed initiation. The results indicate that in two-hole contour blasting, the stress superposition zone, which produces local stress enhancement in the vicinity of the stress wave collision point, moves closer to the later detonated hole. The superposed stress facilitates the preferential extension of blast-created cracks along the connection line of boreholes, and the crack from the later detonated hole extends farther than that from the first detonation hole. The optimal crack coalescence in contour blasting archives when the delay time allows stress waves to approximately propagate through the hole spacing.

Boiling regimes of a single droplet impinging on a superheated surface: Effect of the surrounding medium

Impinging droplets on a hot surface is a significant phenomenon in many industrial applications, such as spray cooling. Previous studies reported various morphological behaviours affecting the droplet's wetting, heat transfer, and evaporation characteristics. However, there is an ambiguity in understanding the influence of the surrounding medium on the resulting boiling regimes. The present work aims to study this aspect through an experimental investigation using high-speed photography and infrared thermography. During the experiments, the degassed FC-72 liquid droplets have impinged onto a heated chromium-plated calcium fluoride (CaF2) surface with a constant impact velocity. Three ambient conditions, such as saturated vapour (heated vapour), air at liquid saturation temperature (heated air), and air at room temperature (ambient air), are used. The surface temperature is varied in each ambience until the complete droplet dewetting, i.e., the Leidenfrost phenomenon has appeared. In this study, the stages of boiling are perceived as film evaporation, excessive and nominal bubbly boiling, transition, and Leidenfrost. With different surrounding media, the onset of a regime and its boiling morphology are distinct. During the film evaporation regime, the droplet heat transfer is high for the impact in ambient air, and the contact line evaporation is dominant in the vapour medium. In contrast, heat transfer is improved in a vapour medium during the bubbly boiling process, reaching up to 30% enhancement compared to the droplets in air surroundings. It is attributed to increased nucleation sites and excessive bubbling compared to air media. Correlations from the literature are also revisited to understand the onset of bubbly boiling and the droplet breakup at the Leidenfrost point. An overall comparison of droplet heat transfer during the boiling regimes in surrounding media is discussed in this paper.

Mechanical Analysis of Rice Canopy Using Explicit Dynamics and Practical Applications of Canopy Opener

Open-canopy pesticide application technology is not affected by the canopy structure and can substantially increase droplet penetration and deposition in the middle and lower rice canopy. However, the optimal working position of the canopy opener is difficult to determine. The purpose of this study was to examine the characteristics of rice canopy disturbances under the action of a canopy opener, verify simulation results using high-speed photography tests, and identify the spraying effect of the optimal operating parameters of a canopy opener through spray tests. The mechanical characteristic parameters of the rice heading stage were determined through experiments, and the canopy-opening process was simulated based on the finite element method of explicit dynamics. The simulation results show that when the speed of the canopy opener is 1.2 m s−1 and the height is 0.6 m, the rice canopy is the most disturbed. The spray experiment results show that under this condition, the overall coverage rate of the rice canopy is relatively high, and the coverage rates of the upper, middle, and lower layers of rice are 92.18%, 66.43%, and 52.84%, respectively.

Numerical simulation research on multiphase flow of aviation centrifugal pump based on OpenFOAM

This paper aims to tackle the calculation efficiency problem raised in the cavitation-flow simulation of the aviation centrifugal pump due to the fading-away interface resulting from the dissipation of numerics used in the phase-change control equation for unstructured-grid multiphase flow, and due to the limitation of flow time-step in whole flow regimes, the control equation of vapor–liquid two-phase flow considering cavitation mass transport is established firstly, modifying the momentum equation by introducing the surface tension, and adding the artificial convective flow to the phase equation to solve the numerical dissipation problem. Secondly, in consideration of the local time step principle and based on the multi-dimensional general limiter algorithm with explicit solutions under the OpenFOAM platform, a solution method of steady-state VOF (Volume of Fluid) model considering cavitation two-phase change is constructed, and the feasibility of this method is verified by NACA hydrofoil and NASA flat plate inducer. Finally, based on the platform developed, the cavitation performance of an aviation centrifugal pump inducer is analyzed. The research results show that the error of the calculated cavitation pressure distribution for NACA hydrofoil between the simulation test and the experimental-test is less than 5%, and the maximum error of calculated cavitation number at pump head dropping for NASA high-speed flat plate inducer between the simulation test and the experimental-test is 2.1%. The cavitation area observed in the simulation test is the same as that obtained in the high-speed photography test. Based on the OpenFOAM simulation method, the position of pump head dropping of the fuel centrifugal pump can be accurately captured. The error of the calculated cavitation number at pump head dropping between the simulation test and the experimental test is about 3.7%, showing high calculation accuracy.

Study of arc behavior and machining effects of the novel magnetic field assisted blasting erosion arc machining method

Electrical Arc Machining (EAM) is a high-efficiency, cost-effective method for machining electrical conductive materials especially difficult-to-cut ones. Because this thermal process relies on high-density energy to melt and remove material, effective arc control is crucial to maintain stable machining without overheating the workpiece. However, due to the limited discharge gap, it is difficult for the existing arc breaking methods to manage the arc plasma in a timely and uniform manner. This paper proposes a novel method named Magnetic Field Assisted Blasting Erosion Arc Machining (M-BEAM). This method introduces a magnetic field to enhance the control effect on arc plasma by directly influencing charged particles. Initially, the arc control and material removal mechanisms were revealed through an analysis and experiments of single arc discharge. Both simulated particle trajectory and high-speed photographs demonstrated that the arc plasma deflects much earlier in the magnetic field than that of traditional BEAM. Moreover, the expulsion effect of molten metal was significantly improved, resulting in a larger volume crater. Building on this, the magnetic-assisted arc control mechanism was utilized to enhance the performance of BEAM. Experimental results indicate that compared with traditional BEAM, Magnetic Field assisted BEAM increases its Material Removal Rate (MRR) by 10.09% while significantly reducing the Tool Wear Ratio (TWR) by 29.02%. Additionally, surface roughness (Sa) is decreased by 47.73%, and the thickness of the recast layer is decreased by 78.54%. Therefore, M-BEAM can further improve the machining performance and build a good foundation for subsequent machining.

Characterization of Spray Field for Water-Emulsified Diesel Using a Pressure Swirl Atomizer Under a Nonreacting Environment

Abstract Employing a mixture or an emulsion of water and diesel fuel is considered a way to reduce gas emissions such as NOx and soot in a gas turbine. This study presents detailed experimental results on the spray characteristics of a water–diesel emulsion injected by a pressure swirl atomizer with a 90-degree spray angle and a flow number of 0.58 under a nonreacting environment at high pressure and temperature conditions. Acquiring these data is a key step when configuring a combustor that will employ emulsified fuels. In addition, this study seeks to confirm that the emulsion stays intact when it gets sprayed into the combustor. Furthermore, this study attempts to understand if a water–diesel emulsion prepared by a sonicator improves fuel atomization as compared to a water–diesel mixture prepared by a static mixer, i.e., not a proper emulsion. Tests are conducted in a high pressure and temperature testing facility at two ambient pressures and three ambient temperatures and the water to diesel ratio (W/D) is varied from 11% to 100% by mass. Phase Doppler Particle Anemometry (PDPA) is employed to measure the spray characteristics. Through a backlit high-speed photography, overall spray patterns over different test conditions are visualized. Mie-scattering and planar laser-induced fluorescence imaging are utilized to visualize the mixture field. In general, the results indicate that emulsion stays intact as it gets sprayed into the combustor; and emulsion is a better solution to reduce emissions than a statically mixed mixture.

Visualization study on the ignition and diffusion combustion process of liquid phase ammonia spray ignited by diesel jet in a constant volume vessel

Ammonia fueled engines applying diffusion combustion mode is expected to further improve the thermal and combustion efficiencies with high burning rate and high ammonia energy replacement. However, there is a lack of the fundamental studies about ammonia diffusion combustion characteristics. Therefore, the fundamental optical experiments of liquid phase ammonia spray and combustion, which is ignited by pilot diesel injection, were performed to investigate the ignition and diffusion combustion characteristics of liquid phase ammonia. According to the high-speed photography, interaction processes between the liquid phase ammonia spray and the diesel spray had been described, and the whole ignition and combustion processes were also recorded in detail. The discussion about the effect of diesel jet ignition location on ammonia ignition process shows that the effective ammonia ignition zone by diesel spray is the region of gas entrainment zone except for the liquid phase ammonia volume under evaporated condition, where the interval on ammonia spray axis is about 16 mm ∼ 35 mm away from the ammonia nozzle exit under the current experimental conditions, and the ammonia spray is failed to be ignited at any region out of the effective ignition zone. Moreover, the ammonia diffusion combustion characteristics under various ammonia injection durations reveals that the entrainment, including both the diesel flame and the surrounding ambient gas, into the effective ignition zone of liquid phase ammonia spray, is the effective way to achieve reliable ignition and the subsequent diffusion combustion of ammonia, which can increase the energy ratio (ammonia to pilot diesel) up to at least 2.9. Finally, based on the control of combustion mode of the pilot diesel, utilizing premixed diesel flame to induce the diffusion combustion of ammonia is proved to be an effective regulation scheme to enhance the performance of ammonia combustion under engine-like thermal conditions.

Improved flow boiling characteristics in minichannel with open-cell porous ribs

Porous metal has been proven to exhibit significant heat transfer enhancement in minichannel. Focusing on fully utilizing the advantages of porous metal in heat transfer and reducing pressure penalty, a porous ribs minichannel (PRM) heat sink employing open-cell porous copper as rib was designed and fabricated. PRM heat sink has 19 minichannels that are 1 mm in width and 2 mm in depth. Commercial open-cell porous copper with a porosity of 0.85 and 120 PPI (Pore per Inch, PPI) was selected. Flow boiling experiments were carried out with ethanol as the working fluid. The flow patterns of two heat sinks were recorded with a high speed photograph system and comparative analyzed. High-frequency periodic motion of vapor core boundary in width direction of porous ribs minichannel was recorded. This is considered a fluctuation of density wave along the channel width direction. Cooperating with capillary force, movement of vapor core boundary induces mass transfer between adjacent channels, compensating for uneven flow distribution between channels. The results show that PRM heat sink has better heat transfer performances and flow stability with a slight increment in pressure drop compared with solid ribs minichannel (SRM) heat sink. The porous ribs minichannel heat sink provides a new way to relieve flow insatiability for heat exchangers and thermal management systems.

Analysis of pulse combustion processes and thermodynamic cycles in pulse combustors

This study explores the dynamic behavior of pulsating combustors during stable operation, examining pressure characteristics, flame dynamics, and thermodynamic cycles. Through analysis of pressure signal derivatives and high-speed photography, it unveils a distinctive counterclockwise thermodynamic cycle in these combustors, diverging from prior research. Crucial points in the combustion process, including zero-pressure points, valve timings, and flame ignition dynamics, were successfully identified. The research introduces a novel clockwise thermal cycle diagram based on ignition events and valve operations, providing real-time insights into combustion processes. Key findings include the identification of critical combustion process points, immediate flame ignition upon valve opening, and the introduction of an innovative thermal cycle diagram. The study's comprehensive approach, integrating pressure analysis, flame dynamics, and derivative curves, offers profound insights into the dynamics of pulsating combustors, furthering our understanding and providing avenues for optimization. Our comprehensive approach enhances the understanding of pulsating combustor dynamics and provides valuable insights for system improvement. The unconventional thermodynamic cycle underscores the novelty of our work. These findings are pivotal for enhancing combustion efficiency and reducing emissions, emphasizing the significance of further research and development in this field.

Experimental study on influence of particle shape on shockwave from collapse of cavitation bubble

The bubble dynamics under the influence of particles is an unavoidable issue in many cavitation applications, with a fundamental aspect being the shockwave affected by particles during bubble collapse. In our experiments, the method of spark-induced bubbles was used, while a high-speed camera and a piezoresistive pressure sensor were utilized to investigate how particle shape affects the evolution of shockwaves. Through the high-speed photography, we found that the presence of the particle altered the consistency of the liquid medium around the bubble, which result in the emitting of water hammer shockwave and implosion shockwave respectively during the collapse of the bubble. This stratification effect was closely related to the bubble-particle relative distance φ and particle shape δ. Specifically, when the bubble-particle relative distance φ < 1.34 e-0.10δ, particles disrupted the medium consistency around the bubbles and led to a nonspherical collapse and the consequent stratification of the shockwave. By measuring the stratified shockwave intensity affected by different particle shapes, we found that the stratified shockwave intensity experienced varying degrees of attenuation. Furthermore, as the particle shape δ increased, the attenuation of the particle on shockwave intensity gradually reduced. These new findings hold significant theoretical implications for elucidating cavitation erosion mechanisms in liquid–solid two-phase flows and applications and prevention strategies in liquid–solid two-phase cavitation fields.

Stab resistance mechanism of lightweight PLA/CFRP hybrid composite structures

The preparation of lightweight and high-performance material is of great significance for developing stab-resistant clothing. This paper proposes a stab-resistant composite structure combining lightweight polylactic acid (PLA) and carbon fiber reinforced polymer (CFRP). The effect of stacking sequence and filling density on the puncture resistance of composite structures was investigated by dynamic puncture and quasi-static puncture. Puncture load, energy and depth are studied as key parameters of puncture resistance. This paper investigated composite structures' failure process and damage morphology using high-speed camera photography and microscopic imaging techniques. The results show that the composite structure exhibits the strongest puncture resistance when CFRP is designed on the top layer of PLA. The higher the filling density, the lower the puncture depth of the composite structure, but the increase in the overall weight eventually leads to a decrease in the puncture specific energy (PSE). The introduction of the bottom PLA delays the penetration point of the composite structure and increases the absorption of the penetration energy by the CFRP before penetration. The final damage modes of composite structures include fiber fracture, slip and pull-out, matrix fracture and peel damage, as well as fracture damage and plastic deformation of PLA materials.

Experimental study and numerical simulation of the combustion characteristics of dust clouds in vertical pipelines underneath unilateral obstacles

To reveal the impact of unilateral obstacles on the combustion characteristics of dust clouds inside vertical pipelines. This paper uses high-speed photography to conduct research on the combustion of vertical dust clouds using a self-designed experimental platform. A numerical model is established using Fluent to numerically simulate the combustion process. The results show that obstacles can increase flame spread velocity inside the pipeline, leading to an increase in peak temperature. As the blockage ratio of the obstacles increases, the flame profile becomes increasingly distorted. The maximum flame spread velocity and temperature initially increase and then decrease, with the maximum flame spread velocity reaching further away from the pipeline outlet. At the same time, high blockage ratios can lead to the accumulation of dust concentration underneath obstacles, resulting in a continuous turbulent reaction. As the number of obstacles increases, the maximum flame spread velocity and temperature gradually increase, and the maximum flame propagation ratio is closer to the pipeline outlet. The experiment and the flame propagation procedure (as calculated by numerical simulation) are consistent. The discrepancy between the simulated results and the experimental results is < 15 %.

Head Flail Corridors From Sled Impact Acceleration Tests for Use in Occupant-Centric Vehicle Design.

In aircraft crashes, injuries to the head and upper torso are frequently reported, with head injury reported most frequently of all body regions. Because preventing flail of the head and body is of utmost importance for occupant survival, the Aircraft Crash Survival Design Guide (ACSDG), the guide to crashworthy aircraft design, published flail envelopes. However, the ACSDG flail envelopes are based on a single test with an anthropomorphic test device subjected to a frontal acceleration. In this article, human research volunteer (HRV) response data are used to calculate head flail corridors and evaluate the ACSDG flail envelopes. Data from HRV sled tests were obtained from the historical Naval Biodynamics Laboratory collection of the Biodynamics Data Resource. Digitized high-speed film for each test was tracked and processed to represent the head flail response in a format amenable to corridor development. Time-based and position-based head flail corridors were developed for groups of exposure-matched tests and then compared to the ACSDG flail envelopes. A collection of 714 HRV sled tests conducted in six different impact directions ranging from 3 to 15 g was used to develop time-based and position-based head flail corridors for 39 match groups. The ACSDG vertical limit and anteroposterior limit and curve were not exceeded by the flail corridors, but the lateral limit and curve were exceeded by 4.6 cm to 15.8 cm. The flail corridors provide a useful baseline for representing the well-restrained occupant response at lower, non-injurious exposure levels and across multiple impact directions. Under these conditions, the ACSDG lateral limit and curve are not adequate. At higher exposure levels or with modified restraints, seating, or equipment, the ACSDG vertical limit and anteroposterior limit and curves may also be inadequate.

Optical engine experiments on combustion and emission performance of n-dodecane/ammonia dual fuels

Ammonia is regarded as a promising carbon-free fuel, but it suffers from poor ignition and combustion as well as heavy emissions. High-reactivity fuels are often adopted as ignition boosters to solve these issues. In this work, the combustion and emission characteristics of n-dodecane and ammonia dual fuels were studied in an optical engine, with emphasis on the role of n-dodecane addition and injection timing. Simultaneous pressure acquisition, high-speed photography, and FT-IR spectroscopy were adopted for measurements. The results demonstrate the significance of ammonia energy ratio and n-dodecane injection timing in improving engine performance. Specifically, engine combustion is suppressed as ammonia energy ratio is raised, manifesting decreased peak pressure, postponed combustion phasing, and enlarged cyclic variations. Visualizations show that such changes are closely related to the evolutions of flame initiation and development. Meanwhile, there are always unburned regions which become pronounced at higher ammonia energy ratios, answering for the massive emissions of NH3 and NOx. Furthermore, with the advance of n-dodecane injection timing, engine performance is first improved and then suppressed, featuring nonmonotonic variations in in-cylinder pressure and combustion evolutions. Particularly, ignition delay and late-stage combustion duration are largely prolonged, which is associated with the weakness of fuel stratification and combustion mode transition. The advance of n-dodecane injection timing facilitates unburned NH3 reduction while increasing NOx and N2O emissions. High thermal efficiency while reduced pollution emissions can be achieved under suitable injection timing conditions. This work can provide useful insights into the combustion control of diesel and ammonia dual-fuel engines.

Cavity evolution of the high-speed cylinder entering the water under different ice-hole diameter constraints

In this study, experimental research on the oblique water-entry process of the high-speed cylinder under the ice-free condition and three different ice-hole diameter conditions based on the high-speed photography technology is carried out. The experimental repeatability is verified. The influence of the ice-hole constraint on the evolution process of the cavity of the cylinder is investigated by dividing in three stages: the cavity expansion stage, the surface closure stage, and the deep closure stage. Besides, the evolution characteristics of the cavity under four different experimental conditions are studied. Results show that during the cavity expansion stage, the cavity expansion is constrained by the ice-hole. The left side of the cavity near the free surface is curved. With the increase of the ice-hole diameter, the curvature of the left side profile of the cavity gradually decreases. The liquid around the water-entry point impacts the inner wall of the ice-hole to generate a reflective flow. During the surface closure stage, the impact of the reflective flow inhibits the contraction of the right side of the cavity wall, which further induces that the surface closure of the cavity is delayed. Besides, under the influence of smaller ice-hole, the right tail of the cavity wall is impacted by the reflective flow and a local impact collapse occurs. As the diameter of the ice-hole increases, the right tail of the cavity wall is folded but does not collapse significantly, and independent surface closure jet and reflective flow can be observed. During the deep closure stage, under the ice-hole constraint, in addition to the puff-off collapse, it can be found that the shedding collapse is accompanied by the local impact collapse. The occurrence of cavity deep closure of the cylinder is accelerated.

Effect of laser oscillation and beam incident angle on porosity in double-sided filler welding of 2219 aluminum alloy T joint

In the current research, the double-sided laser beam oscillation filler welding (DLBOW) with beam incident angle from 20° to 40° were carried out for 2219 Al-Cu alloy T joint welding. Double-sided laser beam filler welding (DLBW) was conducted as a reference group. 3D computed tomography (CT) scanning analysis method was performed to investigate the precise three-dimensional locations of the porosity defects in the T joints. High-speed photography was conducted to evaluate the keyhole stability. The dynamic behavior of keyhole of DLBW and DLBOW was simulated by Flow-3D to study the formation process of pores. The effects of beam oscillation and beam incident angle on the macrostructure, microstructure, porosity, and mechanical property of T joints were discussed. It was found that beam oscillation and smaller beam incident angle promoted porosity suppression. The mechanical properties of T joints were improved by laser oscillation. With the beam incident angle of 20°, the porosity of T joint welded by DLBOW was lowest (0.26 %). The hoop tensile strength and T-pull tensile strength of the T joint were 403 MPa and 302 MPa, approximately 89.5 % and 71.6 %, in contrast with that of the base metal.

Formation of a Spray of Conducting Liquid under High Voltage and Electrical Discharge Plasma

The joint impact of an electrical discharge and a gas–droplet flow of a conducting liquid created by a centrifugal nozzle is studied. In the experiment, the electrical parameters of the discharge are recorded, and the local characteristics of the spray, namely, the droplet diameter distributions of the number of droplets and the components of their velocity vector are measured. The measurements are carried out using double shadow microphotography. The effect of a spray of a conducting liquid on the time-averaged electrical parameters of the discharge, as well as changes in the properties of the spray under the influence of high voltage and current, are studied. Additionally, the spray characteristics are measured when a high voltage of pre-breakdown value is applied. High-speed photography of a discharge in the presence of droplets of conducting liquid is carried out.

Micro-explosion of emulsion droplets with nanoparticles at high temperature

Compared with traditional fuels, emulsified fuels can improve fuel atomization and combustion, and nanoparticles as additives have the potential to enhance combustion and reduce emissions. Previous studies on micro-explosion mainly considered emulsion droplets, but the role of nanoparticles in emulsion droplets is still unclear. In this study, we experimentally investigate the micro-explosion of emulsion droplets with nanoparticles via high-speed photography, digital image processing, optical microscopy, and scanning electron microscopy. The results show that the presence of nanoparticles can greatly improve the strength and probability of micro-explosion, particularly for carbon nanoparticles. This is mainly because nanoparticles can agglomerate during the evaporation of emulsion droplets, facilitate the absorption of radiation energy, inhibit the diffusion of superheated vapor, and ultimately promote micro-explosion. The effects of nanoparticle mass fraction and water content are also investigated, and the results show that the increase of nanoparticles and water can facilitate micro-explosion.

Experimental study on the coupling effect of heptafluoropropane and different arrangement of obstacles on methane-air explosion

The influence of heptafluoropropane（CF3CHFCF3） with different barrier arrangements on the prevention of methane-air explosions in semi-closed pipes is examined in this research. Using high-speed photography and pressure sensors, the propagation traits and pressure data of flames were captured on the self-built explosion test platform. The findings demonstrate that, in the absence of barriers, a 1% concentration of CF3CHFCF3 promotes the spread of methane explosions, with an 8.6% reduces in flame propagation time. However, as CF3CHFCF3 concentration rises, the strength of the inhibition of methane explosions weakens with increasing concentration, and at a concentration of CF3CHFCF3 greater than 5%, the explosions are completely inhibited. When barriers of different arrangements are introduced, the inhibition impact of CF3CHFCF3 on methane explosion is improved. In these barriers, the maximum boosting rate and peak explosion overpressure are decreased by 28.81% and 97.27%, respectively. The staggered arrangement of barriers provides a higher coupling effect when the concentration of CF3CHFCF3 is between 1% and 3%, while the symmetrical arrangement of barriers has the optimum coupling effect when the concentration is between 4% and 5%.

Analysis of impact and absorbed energy of Fritillaria ussuriensis maxim during drum screening and its effect on impact damage

To analyze the severe mechanical damage of Fritillaria ussuriensis Maxim (FUM) during drum screening, the sliding speed of the FUM lifting plate, maximum separation angle of the lifting plate, falling height corresponding to the maximum separation angle, and impact energy of FUM on the contact materials of the drum wall were determined by conducting theoretical analysis based on the equations of sliding motion of the FUM mixture along the lifting plate, slanting motion, force balance, and kinetic energy. The maximum separation angle of a FUM mixture was measured by employing high-speed photography, and the theoretical formula was revised. The impact force data was collected using a Model 1199 stress–strain sensor, and the evaluation index of the relationship between the absorbed energy and the impact force was established. The effects of the falling height, collision material, and falling direction on the energy absorption of FUM were analyzed by performing a single-factor test. The results of theoretical and experimental analyses showed that the sliding speed of the FUM lifting plate increased with the increase in the drum’s rotating speed and that the falling height and impact energy initially increased and then decreased with the increase in the drum’s rotating speed. The absorption energy of FUM increased with the increase in the falling height, but the absorption energy of forward falling and lateral falling had no significant change with mass. The effect of the impact materials (steels plate, FUM, soil, and screening mesh) on the absorption energy of FUM was determined. The percentage of damage and breakage of FUM had a quadratic relation with the impact energy, and their determination coefficients were 0.97054 and 0.99993, respectively. The results of this study can be useful for the optimization of key parameters during the design of a low-loss screening device for FUM harvesting.