Simulation of Viscous Flows Around A Moving Airfoil by Field Velocity Method with Viscous Flux Correction
Simulation of Viscous Flows Around A Moving Airfoil by Field Velocity Method with Viscous Flux Correction
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DOI：
10.1017/s2070073300001156
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发表时间：
2012-06
影响因子：
1.4
通讯作者：
Ningjie Gu;Zhiliang Lu;Tongqing Guo
中科院分区：
文献类型：
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作者：
Ningjie Gu;Zhiliang Lu;Tongqing Guo
基于场速度法，提出了一种模拟非定常翼型俯仰和俯冲运动的新方法。模拟了不同条件下翼型对俯仰和俯冲运动的响应。将所得结果与移动网格法进行了比较，结果吻合较好。在传统的场速度法中，通常采用欧拉求解法来模拟翼型的运动。然而，当考虑粘性效应时，必须求解非定常Navier-Stokes方程并考虑粘性通量修正。在网格速度分布不均匀的情况下，将粘性通量修正引入常规场速度法。对NACA0012翼型绕流的数值实验表明，该方法可以很好地模拟粘性运动边界流动问题。
Based on the field velocity method, a novel approach for simulating unsteady pitching and plunging motion of an airfoil is presented in this paper. Responses to pitching and plunging motions of the airfoil are simulated under different conditions. The obtained results are compared with those of moving grid method and good agreement is achieved. In the conventional field velocity method, the Euler solver is usually used to simulate the movement of the airfoil. However, when viscous effect is considered, unsteady Navier-Stokes equations have to be solved and the viscous flux correction must be taken into account. In this work, the viscous flux correction is introduced into the conventional field velocity method when non-uniform grid speed distribution is occurred. Numerical experiments for the flow around NACA0012 airfoil showed that the proposed approach can well simulate viscous moving boundary flow problems.