Numerical Simulation of the Supersonic Disk-Gap-Band Parachute by Using Implicit Coupling Method

Affiliation of Author(s):航空学院

Journal:INTERNATIONAL JOURNAL OF NONLINEAR SCIENCES AND NUMERICAL SIMULATION

Key Words:supersonic parachute fluid-structure interaction membrane structure compressible flow breathing phenomenon shock wave oscillation

Abstract:The implicit coupling method is applied to model the 0.8m disk-band-gap parachute at Mach 2.0. The fluid and structure governing equations are solved by the Lower-Upper Symmetric Gauss-Seidel (LU-SGS) algorithm and Newmark scheme, respectively. By exchanging the numerical results of the coupling surface with Gauss-Seidel algorithm, high accuracy solutions at every physical time step are obtained. The numerical results of the canopy drag coefficient and projected area fit well with the wind tunnel test results. The simulation reproduces the shock oscillation and breathing phenomenon of the canopy that are usually observed in these systems at Mach 2.0. Furthermore, it is found that the unstable saddle point is the main reason for the shock oscillation of the canopy. And the unsynchronized phases of the canopy area and shock oscillation curves lead to the drag of the canopy oscillate in irregular state.

ISSN No.:1565-1339

Translation or Not:no

Date of Publication:2017-08-01

Co-author:杨雪,yx,Shen, Cheng,Zhao, Xiao Shun

Correspondence Author:yl

Date of Publication:2017-08-01