Simulation of Oscillating Airfoil and Rectangular Wing Flow Using Dynamic Cartesian Grids
Numerical methods using dynamic Cartesian meshes for time-accurately solving unsteady flow problems involving moving boundaries are implemented. A MUSCL type cell-centered finite-volume scheme is presented for solving the 2 -D and 3-D time-dependent Euler equations based on Cartesian coordinate system with arbitrary velocities control body. Solutions are advanced in time by explicit three-stage Runge-Kutta integration with up to second-order temporal accuracy. To avoid grid motion induced error, the geometric conservation law (GCL) is satisfied numerically. Mesh movement strategy is implemented by the combination of mesh deforming and remeshing, using an improved spring analogy with boundary improvement and torsion effect improvement to control mesh deforming. The results of mesh deforming about a rotating airfoil show that the new spring analogy greatly improves the deforming ability and mesh quality without reducing the computational efficiency. For cases with relative large boundary displacement, when severely distorted elements appear, the mesh is regenerated by quadtree method and flow properties are interpolated from the old mesh to the new one linearly. This deforming method coupled with unsteady Euler solver is applied to simulate unsteady transonic flow about oscillating airfoil (2 -D) and oscillating rigid rectangular wing (3-D). Computational results are in good agreement with experimental date show that the unsteady flow field solver is correct and the Cartesian dynamic mesh technique of the dissertation is accurate and credible. The unsteady flow field solver can be applied to various kinds of problems with moving and deforming boundaries.
unsteady flow Cartesian grid dynamic grid numerical simulation
Zhang Shaoping Zhang Yudong Zhang Weiming
Aerodynamics research and development center, China academy of aerospace aerodynamics, Beijing 10007 Aerodynamics research and development center,China academy of aerospace aerodynamics, Beijing 100074
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
452-455
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）