基于CFD/CSD耦合的高速空气舵系统颤振边界计算

Flutter Boundary Calculation of High Speed Air Rudder System Based on CFD/CSD Coupling

高速飞行器空气舵工况愈发恶劣,随着CFD和CSD计算技术的不断发展,高精度的空气舵颤振边界计算相关研究得到学术界广泛关注。采用CFD技术进行非定常气动力的计算,采用CSD技术进行真实舵系统的结构动力学分析,采用径向基函数(RBF)插值的方法实现两种网格的数据交互,从而建立起CFD/CSD耦合计算的气动弹性仿真平台。以文献中的空气舵为例,计算在不同来流工况下的时域响应结果,最终得到该空气舵的颤振临界动压。对比风洞试验结果表明:仿真计算结果与试验结果基本吻合,该气动弹性仿真平台具有较好计算精度,可为空气舵设计提供一定的工程指导。

The aerodynamic conditions of high-speed aircraft rudder are becoming more and more severe.With the development of CFD and CSD,the flutter boundary calculation of air rudder with high precision has been widely concerned in academic circles.CFD is used to calculate unsteady aerodynamic forces,CSD is used to analyze the structural dynamics of real rudder system,radial basis function(RBF)interpolation is applied to realize data interaction between two kinds of grids,thus an aeroelastic simulation platform of CFD/CSD coupling calculation is established.Taking a rudder in the literature as an example,the time domain response results under different flow conditions are calculated,and the critical dynamic flutter pressure of the rudder is obtained.The comparison of the wind tunnel test results show that the simulation results are in good agreement with the experimental results.The aeroelastic simulation platform has a good calculation accuracy,which can provide some engineering guidance for the design of air rudder.