高超声速壁板流固热耦合建模与分析

基于气动热、气动弹性双向耦合的热气弹分析方法,建立了高超声速三维壁板流固热耦合分析模型。气动力计算采用三阶活塞理论,气动热计算采用参考温度法,热传导和结构响应采用有限元方法进行。研究了不同边界条件、飞行轨迹下耦合方式对三维壁板热气弹响应的影响。结果表明:不同流固热耦合机制对高超声速气流中壁板响应预测影响各不相同,表明了研究的必要性。

Coupled Fluid-Thermal-Structural Modeling and Analysis of Hypersonic Skin Panel

According to the fluid -thermal-structural coupling theory , a coupled model of three-dimensional panel in hyperson-ic airflow is established .The third -order piston theory is applied for the unsteady aerodynamics , the reference temperature method is used to compute the heating , and the finite element method is used for the heat transfer and structural deformation com -putation.Impacts of coupling types on response of the three -dimensional panel under different flight trajectory and structural boundary conditions are assessed .It is found that physical fluid -thermal-structural coupling mechanisms have much impor-tance on response prediction of panel in hypersonic flow and the study is essential .