Numerical Analysis of Unsteady Thermo-Fluid Behavior for Launched Body using Chimera Mesh

Son, D.H.; Sohn, C.H.; Ha, J.H.

Journal of the Korea Institute of Military Science and Technology 2010;13(6):1013-1018.

D.H. Son, C.H. Sohn, J.H. Ha

¹Kyungpook National University
²

키메라 격자를 이용한 발사체의 비정상 열유동해석

손동현, 손창현, 하재훈

¹경북대학교
²국방과학연구소

Abstract

This paper presents a numerical evaluation of the launch dynamics and thermo-fluid phenomena for gas generator launch eject system. The existing gas dynamic model for launching eject body used ideal gas and adiabatic assumption with empirical energy loss model. In present study, a turbulent Navier-Stokes solver with CHIMERA mesh is employed to predict the detail unsteady thermo-fluid dynamics for the launched body. The calculation results show that proper grid number is necessary for good agreement with experimental data. The important effects for accurate prediction are a gap distance and thermal boundary condition on the wall. The computational results show good agreement with experiment data.

Key Words: Launch, Chimera Mesh, Gas Generator