原子輻射を伴う極超音速再突入流れのDSMC数値解析(反応・多相系高エネルギー,一般講演)

概要

論文の詳細を見る
Earth re-entering spacecrafts at high Mach numbers generate a strong shock region ahead of the blunt body, and these extreme Mach number flows are sufficiently energetic to initiate gas ionization and thermal and chemical ablation processes. The electronically excited and ionized particles affect the nonequilibrium atomic and molecular energy distributions and radiation within the shock layer. In this work, we present the first direct simulation Monte Carlo (DSMC) simulations coupled with the particle- or finite volume- photon Monte Carlo (PMC) method to simulate Stardust reentry flows from continuum to the transitional flow regime. The average ion velocity model was used to simulate a quasi-neutral flow. It was found that the high radiation energy leads to a decrease in gas temperature in the shock layer and a decrease in the convective heat flux to the body.
2009-09-02