219404 曲がり管を伝播するデトネーションの波面形態に関する数値解析(OS13 安全に寄与する熱工学2,オーガナイズド・セッション)

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The detonation propagation in 180deg and 360deg bend tube was numerically investigated using two-dimensional Euler equations with a one-step chemical reaction model governed by Arrhenius kinetics. This paper describes the effect of curvature radius of inner diameter (R=37.5L_<1/2>, 200L_<1/2>, 450L_<1/2>) and activation energy (Ea=15, 20, 25, 30, 38.2, 45) on the detonation configuration in the bend tube (the tube width fixed W=150L_<1/2>). At the low activation energy, the detonation propagated with constant configuration, and the high pressure belt was generated near the outer side at R=200L_<1/2>,. The higher activation energy induced unsteady features due to the irregular collision of the triple points and the expansion effect. At the small curvature radius, the detonation propagated on the outer side and fell on the inner side. In the failure configuration, the curved shock wave and combustion wave propagated connecting to the outer detonation.
一般社団法人日本機械学会の論文
2011-03-17