影响火箭滑车空速管感受数据失真数值模拟研究

Numerical Simulation Research on the Influence of Pitot Sensing Atmospheric Data Error of Socket Sled

针对火箭滑车试验空速管感受数据失真的问题,采用CFD方法分析研究了试验状态与飞行状态空速管的绕流特征,探究滑车试验速域的空速管感受数据变化规律;以飞行状态为参考,找出试验与飞行状态感受数据的差异,建立试验与飞行之间空速管感受数据的桥梁,形成试验状态空速管感受数据的修正方法;采用调整机头与轨道间距的方法,研究了影响感受数据失真的关键因素地面效应,给出了不同间距对空速管感受数据的变化曲线。

Aiming at the problem of pitot sensing atmospheric data error during the socket sled testing,in the paper,the flow filed characteristics of two different states of flight and test are analyzed by CFD numerical simulation method,and the change rule of pitot sensing data in the socket sled test speed range is explored.Based on the reference of flight state,the differences of the test and flight are discovered and the bridge between the test and flight is built,finally the correction method of pitot sensing atmosphreic data is formed.Furthermore,by the means of adjusting the gap between the nose and railway,the ground effect of the key factor to sense the atmospheric data is discussed and the static pressure curves with different gap is obtained.