基于CFD/CSD方法的跨声速静气动弹性数值模拟应用研究

Numerical applications on transonic static areoelasticity based on CFD/CSD method

  • 摘要: 针对大型飞机跨声速静气动弹性问题,基于CFD/CSD流固耦合方法开展了数值模拟应用研究。具体方法是:采用RANS方程与静气动弹性平衡方程作为计算控制方程,CFD采用多块对接结构化网格进行分区并行计算,并利用多重网格技术加速收敛;使用RBF结合TFI方法进行网格变形;通过TPS插值实现多场数据交换。基于上述方法开发了计算程序,并与典型风洞试验结果开展了对比研究,验证了方法和程序的有效性。最后通过数值模拟结果,分析了跨声速时静气动弹性对典型大型飞机机翼的几何变形、表面压力及气动性能的影响特性。

     

    Abstract: A numerical simulation based on CFD/CSD method has been carried out to study the transonic static aeroelastic problems of large transporters. The specific methods are described as follows:the Reynolds-averaged Navier-Stokes equations (RANS) and the static aeroelastic balance equation are employed as the governing equations to conduct coupling iterative computation; a multi-block structured grid is generated for parallel CFD computation, and a multi-grid technique is adopted to accelerate convergence; the dynamic mesh generation is completed through the RBF combined with the TFI method; a three-dimensional thin plate spline interpolation technique is adopted to execute the data interchange between the flow field and structure. Based on the above methods and typical wind tunnel test data, a series of codes are developed and validated, and the results indicate the effectiveness of the methods. Finally, the deformation characters, the pressure distribution, and the aerodynamic performance of a typical large transporter's wing are analysed on the basis of the numerical results.

     

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