综合压力畸变指数的计算软件设计及验证

Design and Verification of Synthetical Pressure Distortion Index Calculation Software

设计了专用软件计算稳态压力畸变指数,同时利用该软件绘制了气动界面总压图谱,并利用某风洞试验数据验证了该软件的准确性;设计了数字滤波器对动态压力数据进行处理,研究了滤波器截止频率、数据取样时间对动态压力畸变指数的影响。应用所设计的稳态压力绘图和畸变计算软件及动态压力数据处理方法,对某型飞机飞行时发动机进口气动界面的综合压力畸变指数进行了计算。

The software for calculating steady pressure distortion index was designed and the total pressure pattern for aerodynamic interface was plotted by the software. The accuracy of the software was demonstrated by a tunnel test data. The digital filter was designed for praeessing the dynamic pressure data. The effects of filter cutoff frequencies and data sampling time on dynamic pressure distortion index were investigated. The calculation of synthetical pressure distortion index of aeroengine inlet aerodynamic interface in the flight was performed by using the steady pressure plot and distortion calculation software and dynamic pressure data processing method designed.