Study of velocity effects on parachute inflation performance based on fluid-structure interaction method  

作　　者：程涵 张鑫华 余莉 陈猛 

机构地区：[1]College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics [2]Aviation Key Laboratory of Science and Technology on Aeronautical Life-Support,AVIC Aerospace Life-Support Industries Ltd.

出　　处：《Applied Mathematics and Mechanics(English Edition)》2014年第9期1177-1188,共12页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.11172137);the Aeronautical Science Foundation of China(No.20122910001)

摘　　要：The inflation of a five-ring cone parachute with the airflow velocity of 18 m/s is studied based on the simplified arbitrary Lagrange Euler （SALE）/fluid-structure interaction （FSI） method. The numerical results of the canopy shape, stability, opening load, and drag area are obtained, and they are well consistent with the experimental data gained from wind tunnel tests. The method is then used to simulate the opening process under different velocities. It is found that the first load shock affected by the velocity often occurs at the end of the initial inflation stage. For the first time, the phenomena that the inflation distance proportion coefficient increases and the dynamic load coefficient decreases, respectively, with the increase in the velocity are revealed. The above proposed method is competent to solve the large deformation problem without empirial coefficients, and can collect more space-time details of fluid-structure-motion information when it is compared with the traditional method.The inflation of a five-ring cone parachute with the airflow velocity of 18 m/s is studied based on the simplified arbitrary Lagrange Euler （SALE）/fluid-structure interaction （FSI） method. The numerical results of the canopy shape, stability, opening load, and drag area are obtained, and they are well consistent with the experimental data gained from wind tunnel tests. The method is then used to simulate the opening process under different velocities. It is found that the first load shock affected by the velocity often occurs at the end of the initial inflation stage. For the first time, the phenomena that the inflation distance proportion coefficient increases and the dynamic load coefficient decreases, respectively, with the increase in the velocity are revealed. The above proposed method is competent to solve the large deformation problem without empirial coefficients, and can collect more space-time details of fluid-structure-motion information when it is compared with the traditional method.

关 键 词：fluid-structure interaction （FSI） PARACHUTE inflation performance velocity empirical coefficient opening shock load 

分 类 号：V244.216[航空宇航科学与技术—飞行器设计]