激波管阶跃压力持续时间研究

The Stndy on the Step Pressure Interval Time of the Shock Tube

激波管是较理想的阶跃压力发生器，阶跃压力持续时间是它的一项主要技术参数。本文在理论分析了简单激波管内波系流动图象的基础上，推导了当入射激波马赫数Ｍ１小于设计工况马赫数时，阶跃压力持续时间的计算方法。计算结果和实验结果误差不大于１２％，且试验区阶跃压力时间大于５毫秒，可以满足压力传感器动压标定需要。

The Shock tube is a comparatively ideal step pressure producer,The step pressure interval time is its main technical parameter,Based on analysing the flow pattern of the wave series in the simple shock tube,the method of calculation of the step pressure interval time is developed when the incident shock wave Mach Number M 1 is less than the M 1 under designed condition.The error of the results of calculation and test are not greater than 12 percent,the step pressure interval time of the testing region is greater than 5 ms.It can satisfy the need of dynamic pressure verification of pressure transducer.