ENDGAME - Laboratory Experiment 2023-02-21 Exp. 010 - High Speed Camera data

Shock-tube experiments in combination with high speed Schlieren shadow photography. 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, which become visible due to the high speed Schlieren shadow photography.本数据集包含结合高速纹影阴影摄影（Schlieren shadow photography）技术的激波管实验。 该激波管实验装置由高压储气罐与圆柱形管段组成，二者通过隔膜脉冲阀连接，该阀门可将高压气体快速释放至常压管段内。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（bar）。管段内部可处于空置状态（即充满环境条件下的空气），或填充设定体积的流体（水或粘性流体），亦或填充微小颗粒。本实验采用了不同内径（3厘米与4厘米）及不同长度（30厘米与80厘米）的管段，图像采集帧率为30000帧每秒（fps）。 当阀门开启时，将产生射流，伴随激波与声波在大气中传播，而通过高速纹影阴影摄影技术可使这些流动现象清晰可视。