【摘要】 使用多重网格的方法对二维翼型和三维机翼的跨声速颤振进行了数值求解。流场控制方程为N-S方程,湍流模型采用SA模型网格。计算网格采用结构网格,空间离散采用中心格式,使用双时间法进行时间推进。流场与结构之间的数据通过径向基函数(RBF)插值方法进行交换。通过耦合求解流场控制方程和结构运动方程得到Isogai(case A)机翼模型和Agard445.6机翼的跨声速颤振边界。通过与使用单重网格时得到的结果相比较得出,多重网格方法能够节省计算时间,提高颤振分析计算效率。更多还原

【Abstract】 Numerical simulation of aircraft′s flutter is rather expensive and time-consuming.In order to save expense and calculating time,an efficient fluid-structure interaction solver based on multigrid is developed.The flow governing equations coupled with aeroelastic equations are solved using finite volume algorithm based on multigrid method.For the structural displacements a modal approach is applied.Radial basis function(RBF) method is used for data interaction between CFD and CSD.The system is marched implicitly in time domain using a dual time stepping method.The flutter speed boundary and flutter frequency boundary of Isogai wing model and Agard 445.6 wing are obtained by using above method.The results are in good agreement with related references,it is shown that the method based on multigrid method is effective for aeroelastic simulation.更多还原