Numerical Simulation and Experiment for Impact Point Prediction of Parachute-Warhead System

摘要

Accurate modeling is crucial to the impact point prediction of a Parachute-Warhead System (PWS). Due to the flexibility of canopies, the computation of parachute aerodynamics is a key issue in dynamic modeling. Different from the rigid aircraft, there is a strong interaction between the parachute and its surrounding fluid. Base on the Fluid-Structure Interaction (FSI) method, inflation behavior of a Disk-Gap-Band parachute is investigated firstly. In this way, the lift and drag coefficients are generated. Then, the dynamic model in the terminal falling of a PWS is established based on the obtained aerodynamic parameters. The impact point prediction is accomplished by analyzing the dynamic characteristics. Besides, a numerical simulation airdrop platform is developed accordingly. Finally, the proposed method is verified by airdrop-testing. To conclude, the results show that the modeling methods in inflation and terminal descent are effective to forecast the landing area of the PWS, which will be useful for airdrop missions.