跨声速颤振数值模拟方法研究

An Approach of Numerical Simulation for Transonic Flutter Characteristics

建立了一套完整的跨声速颤振特性工程分析方法。首先分别利用ZTAIC法(等价片条法)、ZTRAN法(域平板法)以及CFD方法直接求解Euler(欧拉)方程3种方法,得到了跨声速非定常气动力,再采用g法求解颤振方程,并将分析结果进行了比较。对比分析表明ZTRAN法和时间线化Euler法能够快速有效地反映跨声速气动力的非线性效应,适应于工程应用上的快速跨声速颤振分析。

A fully engineering flutter characteristics analysis method was presented in this paper. Firstly, the flow variables of transonic unsteady aerodynamics were obtained with the equivalent strip method, field-panel method and Euler equation CFD method. Secondly, the flutter equation was solved in frequency-domain with the g-Method. All flutter results show that the field-panel method and time-linearized Euler method efficiently simulate the nonlinear effects of the flow and are suitable for quick transonic flutter analysis in the engineering application.