917 衝撃波の干渉を受けた火炎の挙動に関する研究(2)(OS9-4 高速流れと衝撃波現象の解明と制御,OS9高速流れと衝撃波現象の解明と制御)

概要

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When a flame front is interacted with a shock wave, a shape of flame front is changed largely and a complicated pressure wave is formed accompanied with a generation of high-pressure and high-temperature regions. Moreover, a turbulent combustion arises and the flame is known to transit the detonation wave, which propagate supersonic velocity. Therefore, a mechanism of the interaction between a shock wave and a flame is significant from a safety-engineering point of view. In this study, an interaction behavior of a flame interacted with a shock wave was investigated by using schlieren method with the aid of high-speed video camera and image converter camera. Furthermore, numerical simulation is conducted in order to investigate the temperature and pressure distributions around the flame. Experiments are conducted by using a shock tube of square cross section of 100 mm. The flame produced by an ignition of methane-air mixture of 30 kPa is interacted with a planar shock wave of propagation Mach number 1.54. The flame front is largely deformed and unburned gas is observed to penetrate into the flame and Richtmyer-Meshkov instabilities are caused. In numerical, similar behavior with experimental are simulated.
一般社団法人日本機械学会の論文
2006-10-28