Measurements of Fluctuations of Mass Flux and Concentration in Supersonic Air/Helium Mixing by Hot-Wire Anemometry

摘要

To realize a measurement method of instantaneous fluctuations of mass flux and concentration in supersonic flow, experiments are made for a Mach 2.4 supersonic 2D air/helium mixing layer by using a double-hot-wire probe and constant voltage anemometry (CVA) circuit with 500 kHz bandwidth. The mean distributions and the instantaneous waveforms of mass flux and helium concentration show that our measurement method proposed in this study can capture the mixing process of the supersonic mixing layer.