激波加载固定单双球模型有效阻力测量

Measurement of Effective Resistance of Fixed Single and Double Sphere Model with Shock Wave Load

提出利用动态压力测量确定激波加载固定颗粒群有效阻力的新测量方法,针对单、双球模型推导了有效阻力表达式,构思了颗粒群模型固定方法,设计了动态压力固定装置和模型球间距可调的可视化实验段。通过膜片材质与厚度、驱动气源等的选择对气相参数实现精确控制,利用细金属丝、笼状支架的连接方式实现颗粒群有效阻力向动态压力信号的转换,通过动态压力P的测定,利用有效阻力表达式最终确定颗粒群有效阻力。为深入开展激波与颗粒群相互作用机理研究和建立更合理的颗粒群阻力系数模型,攻克了后续深入研究的关键难题。

This paper puts forward a new measuring method of using dynamic pressure measurement to determine the effective resistance of fixed particle group with shock wave load; infers the expression of effective resistance in allusion to single and double sphere model, conceives a fixation method of particle group model and designs dynamic pressure fixed device and visualization experiment section with adjustable model sphere space; realizes accurate control of gas phase parameters through the selection of membrane material and thickness and driving air source, realizes the transformation of effective resistance of particle group to dynamic pressure signal through the connection type of fine wire and cage support; and finally determines the effective resistance of particle group using effective resistance expression through the measurement of dynamic pressure P. To further conduct mechanism research on interaction between shock wave and particle group and establish a more reasonable particle group resistance coefficient model, this paper overcomes key difficulties of subsequent further research.