跨声速操纵面嗡鸣的数值研究

Calculation of Transonic Control Surface Buzz

我国的一些高速歼击机，在飞行中曾多次出现操纵面嗡鸣问题，它严重影响了飞机的性能和飞行安全，本文采用数值计算方法，对此问题做较深入的分析和研究。气动力计算采用Navier－Stokes方程，并采用LU－TVD混合差分格式求解由此气动力解操纵面的弹性振动方程，求出现嗡鸣的M数及振动的频率、振幅等参数。计算中采用B－L代数湍流模型，网格生成采用代数方法及保角变换方法，文中讨论了隐式算法在非定常气动力计算中的应用，TVD格式对运动激波的捕捉能力及动网格的生成及处理方法等问题。计算结果与飞行试验结果作了对比。

Recently the problem of transonic control surface buzz occurred many times in flight. It influenced the flight performance and safety seriously. In order to study this problem deeply, in this paper,we use modern numerical method to analyse this problem. The governing equations are the Navier-Stokes equations, and LU-TVD scheme is used to so1ve the equations. Through solving the equation of motion of the control surface, we can find the condition that transonic buzz takes place.In this paper, B-L turbulent model is used, the grid is generated by algebraic method. The app1ication of implicit scheme in unsteady flow calculation, the ability of TVD scheme to capture the shock wave and the prob1em of moving grid generation are also disscused in this paper.The results of our calculation are compared with flight test data.