高圧力比における超音速希薄自由噴流のDSMC計算(流体工学,流体機械)

概要

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Rarefied supersonic free jets through an orifice are investigated by the DSMC method over a wide range of pressure ratio (ρ_0/ρ_1=15〜16000 for 1/Kn=500 and 2500, and ρ_0/ρ_1=∞ for 1/Kn =10〜2500). As the pressure ratio increases, the Mach disk and the barrel shock become thick and weak, then the background gas invades deeply into the jet cell. The density starts to deviate from the isentropic expansion far upstream from the expected location of the Mach disk. The parallel temperature also starts to deviate further upstream from the perpendicular temperature and does not reach the lowest value predicted by the sudden freezing model. The DSMC calculations are compared with the experimental results and the existing analytical result.
一般社団法人日本機械学会の論文
2002-02-25