細管内の衝撃波伝播に関する研究

抄録

Shock wave propagation through circular channel with inner diameter in the order of 1 and 2 mm at different wall temperature is studied using two fast-response pressure transducers. The shock wave is generated by a modified SplitHopkinson Pressure Bar shock tube and introduced into the channel. The shock wave propagation speed near the inlet of the channel is about M~1.1, and quickly decelerates inside the channel. Pressure profile measured in the channel indicates the sharp increase followed by gradual decrease with fluctuations and several small peaks. Wave propagation speed in the tube is slower than that in the open space, and slower in the smaller diameter channel. As the temperature increases, the wave propagation speed increases but the wave Mach number decreases because of the increased speed of sound. A simple estimation shows the flow is transitioned to fully developed between two pressure transducer locations.