ENDGAME - Laboratory Experiment 2023-06-23 Exp. 002 - High Speed Camera data

Shock-tube experiments. The shocktube setup consists of a high-pressure reservoir connected with a cylindrical tube through a diaphragm pulse valve which allows a fast release of pressurized gas into the ambient pressure tube. The high-pressure reservoir is filled with compressed air at a given overpressure with respect to ambient pressure (up to 8 bar). The pipe was either empty (i.e. with air at ambient conditions) or filled with a given amount of fluids (water or viscous fluid) or small particles. We adopted pipes with different inner diameters (3 and 4 cm) and different lengths (30 and 80 cm). Images were collected at a frame rate of 30000 fps. When the valve is open, a jet flow is produced, with shock and acoustic waves propagating in the atmosphere.激波管实验（Shock-tube experiments） 本激波管实验装置由高压储气罐与圆柱形管段构成，二者通过膜片脉冲阀相连，该阀可将受压气体快速释放至常压管段内部。高压储气罐内填充的压缩空气相对于环境压力具有设定过压，最大过压可达8巴。实验管段可设置为空管（内部为环境条件下的空气），或填充定量流体（水或粘性流体），亦或装填微小颗粒。本实验采用的管段内径分别为3 cm与4 cm，管长分别为30 cm与80 cm。图像采集帧率为30000帧每秒（fps）。 当阀门开启时，会产生射流，同时伴随激波与声波在大气中传播。