超音速三角翼多场耦合分析研究

为了对超音速三角翼在气动加热作用下的结构和气动耦合特性进行系统分析和研究,分别采用有限元方法和计算流体力学方法,建立结构和气动分析模型,在此基础上,建立热流、气动压力到有限元节点和有限元节点位移、温度到气动节点的插值模型,确立气动、结构模型之间压力场、热场、温度场和位移场的耦合关系,通过多轮迭代计算,获得考虑耦合效应的结构和气动特性。通过某马赫数为3的三角翼的计算和验证,可以得出,此方法能够对超音速飞行器的气动和结构耦合问题进行比较准确的分析,在超音速飞行器设计中具有较大应用价值。

Research of Multi Field Coupling Analysis for a Supersonic Delta Wing

To obtain a system analysis and research of the multi-field coupling effect on supers- onic triangular wing structure and aerodynamics in the procedure of aero heating, the Finite Element Method(FEM) and Computational Fluid Dynamics method were employed to build the numerical model of structure and aerodynamics of the wing. And then an interpolation method was used to fabricate the bi-lateral data transfer between CFD nodes and FEM nodes, which could couple heat flux and aerodynamics pressure in CFD with node temperature and displacement in FEM together. And after Iterative coupling simulation of CFD and FEM, the special properties of structure and aerodynamics of the delta wing under the consideration of multi-field coupling could be acquired. The verification simulation of a delta wing with the speed of mach 3 proved that the approach in this paper could give an accurate evaluation of both structure and aerodynamics for supersonic vehicles, thus it could be applied in the design of such airplanes.