旋成体跨音速脉动压力环境分析与预测

脉动压力是进行结构响应分析和力学环境研究的重要依据。利用平均流场的数值模拟方法与基于实验的工程预测模型相结合的技术途径,对跨音速下旋成体的表面脉动压力环境进行了分析与预测,给出了旋成体在不同攻角、不同马赫数条件下表面脉动压力系数分布以及脉动压力功率谱分布曲线,并且与实验结果作了比较分析,得出结论基本一致。

Analysis and Prediction of the Fluctuating Pressure Induced by Rotated Aircraft at Transonic Mach Numbers

Fluctuating pressure provides an important basis for the analysis of structure response and for the study of the dynamics environment. A new technical approach is presented, by which numerical simulation of the mean fluid field is integrated with the engineering prediction model based on experiments. For the transonic rotated aircraft, the surface fluctuating pressure environment is analyzed and predicted. And the fluctuating pressure coefficient curves and the power spectral density curves are presented at different transonic Mach numbers and different angles. The results essentially accord with the experiment results.