热流环境下航空发动机短环形火焰筒动力学响应特性分析

Dynamic Response Analysis of Short Annular Flame Fube of Aeroengine in Heat Flow Environment

采用数值仿真分析方法对航空发动机短环形火焰筒结构进行简化处理,构建短环形火焰筒结构模型。通过有限元方法对结构进行流固耦合分析计算,得到火焰筒壁面温度分布及气动压力分布,计算火焰筒结构热模态结果并分析。通过耦合的有限元/边界元法以扩散场的形式对火焰筒结构施加噪声激励载荷,对火焰筒结构多场耦合非线性动力学响应特性进行分析,获得了短环形火焰筒结构在温度载荷、气动力载荷与噪声载荷耦合作用下的动力学响应规律。

The short annular flame tube structure of aeroengine was simplified by numerical simulation analysis method,and the structure model of short annular flame tube was constructed.By finite element method,the fluid-structure coupling analysis and calculation of the structure were performed to obtain the temperature distribution and aerodynamic pressure distribution of the flame cylinder wall,and the thermal mode results of the flame cylinder structure were calculated and analyzed.With the coupled FEM/BEM method of flame tube structure in the form of diffusion field applying noise excitation load,the flame tube structure multi-field coupling nonlinear dynamic response characteristics were analyzed,through which dynamic response of short annular flame tube structure under the coupling action of temperature load,aerodynamic load and noise load was gained.