Euler-Lagrange coupling for porous parachute canopy analysis

The effect of the canopy fabric damage on parachute performance has been investigated numerically and experimentally in the present paper. For this aim, first, flow structure around the parachute canopy has been studied for both damaged and undamaged parachutes. Then, the drag coefficient as the main characteristic of a parachute performance has been examined and compared experimentally and numerically in four Reynolds numbers. Experimental tests for undamaged and damaged canopies have been carried out in an open-circuit wind tunnel laboratory at the velocities 15, 20, 25, and 30 m/s. In order to measure the drag force, a valid tensile load-cell has been used. Also, the smoke flow visualization has been utilized to find the flow behavior at different regions of the parachute. For the numerical simulation, an incompressible pressure-based CFD code using the finite volume method has been applied to solve the complex turbulent flow field around the inflated parachute canopy. To increase accuracy of the numerical simulation, the permeability boundary condition on the parachute canopy has been implemented and its effects have been considered on the flow field. The numerical results indicate that the permeability assumption on the canopy makes desirable results compatible with the experimental ones. Moreover, comparison of the results between damaged and undamaged canopies demonstrates significant differences in the streamlines, pressure distributions, and drag coefficients. As the reliability is the main criterion for the parachute system, investigation on the damage effects would be useful and it has been considered in the present work.

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“…Tutt et al. 30,31 indicated the tension concentration points which show zone of damage probability in the Orion parachute canopy.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of damage effect on a hemispherical parachute performance

Etemadi

Mani

Moghadam

2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…To make the initial inflation model close to actual shape, the interaction of the model in Fig. 3(a) and the flow field is calculated firstly by ALE method [8] . When the parachute appearance turns similar to the fasciculation shape as shown in Fig.…”

Section: Structure and Numerical Modelmentioning

confidence: 99%

“…Most previous works of parachute inflation using FSI technique focus on circle flat parachute or cone parachute [3][4][5][6][7][8][9] . However, the inflation of rotating parachute is not paid enough attention to and remains to be explored.…”

Section: Introductionmentioning

confidence: 99%

Influence of Structure Parameters and Velocity on Inflation Performance of Vortex Ring Parachute

Ma¹,

Guo²,

Rongzhong³

et al. 2015

Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference

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Based on arbitrary Lagrange-Euler method, a vortex ring parachute simulation model was set up, and its inflation was studied under the condition of infinite mass and low-speed airflow. Through changing line length, canopy area and airflow velocity, the inflation processes were simulated, and the time-histories curves of projective diameter and spinning rate were obtained. The influence of structure parameters and airflow velocity on parachute motion characteristics was analyzed. The results show that the limit spinning rate of vortex ring parachute increases with the difference increase of trailing-edge pitch line and leading-edge pitch line. With smaller canopy area and larger airflow velocity, the opening time and steady time of the parachute are shorter, and the limit spinning rate is higher, which is good for inflation and improving kinematic stability.

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“…Tutt and Taylor used the Euler-Lagrange penalty algorithm to simulate the inflation process of a flat circular parachute [19]. en, they applied a new Euler-Lagrange coupling algorithm to introduce the permeability into the FSI simulation and simulated the inflation performance of the disk-gap-band parachute for supersonic Mars exploration under the influence of the wake of capsule [20][21][22][23]. Subsequently, they simulated the inflation process of a flat circular parachute in a finite mass scenario and conducted a series of indoor vertical parachute tests to verify the simulation results [24].…”

Section: Introductionmentioning

confidence: 99%

Study on Transient Dynamics and Aerodynamic Characteristics of a New Type of High-Damping Four-Winged Rotating Parachute Inflation Process

Jiang

Mao

et al. 2020

Mathematical Problems in Engineering

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To decrease the opening shock as well as improve the resistance coefficient and stability of the parachute of aviation weapon under subsonic conditions, a new kind of high-damping four-winged rotating (HFWR) parachute is investigated in this paper. e transient dynamic behavior and aerodynamic characteristics of the parachute during the inflation process are studied. Considering the permeability, the 3D folded finite element (FE) model of the HFWR parachute is established based on the direct folding modeling technique, and the inflation process of the parachute under subsonic flow is simulated using the multimaterial arbitrary Lagrange-Euler (ALE) method. A series of wind tunnel tests are conducted to verify the numerical results. Besides, the opening performances of the HFWR parachute and the round parachute, which includes the inflation process, the dynamic response of the swing angle, and the opening shock load varying with time, are compared under the same conditions. e results show that the opening performance of the HFWR parachute is superior to the round parachute under specific military background. e fluid-structure interaction (FSI) simulation results show good consistency with the wind tunnel tests, which indicates that the numerical modeling can effectively simulate and predict the opening performance and aerodynamic characteristics of the rotating parachute. e modeling method in this paper can help shorten the development cycle, improve the cost effectiveness, and optimize the design of the parachute.

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Euler-Lagrange coupling for porous parachute canopy analysis

Cited by 8 publications

References 20 publications

Numerical and experimental investigation of damage effect on a hemispherical parachute performance

Numerical and experimental investigation of damage effect on a hemispherical parachute performance

Influence of Structure Parameters and Velocity on Inflation Performance of Vortex Ring Parachute

Study on Transient Dynamics and Aerodynamic Characteristics of a New Type of High-Damping Four-Winged Rotating Parachute Inflation Process

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