High-Fidelity Simulation and Flow Control of a Plunging Airfoil under Deep Dynamic Stall
High-Fidelity Simulation and Flow Control of a Plunging Airfoil under Deep Dynamic Stall
复制标题
深动态失速下下降翼型的高保真仿真与流动控制
DOI：
10.2514/6.2019-1395
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Taira
中科院分区：
文献类型：
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作者：
B. Ramos;W. Wolf;K. Taira
本文对SD7003翼型的深动态失速进行了大涡模拟研究。数值计算采用一套高阶紧致格式，在交错网格上计算导数、插值和滤波。在雷诺数Re = 60，000、马赫数M = 0.1、折合频率k = 0.5和振幅h0 = 0.5时，SD 7003型经历了一个切入运动。网格收敛的研究进行，结果表明，与现有的数据在气动系数方面的良好协议。然后在翼型前缘施加流动激励，我们观察到，对于特定的激励频率范围，翼型阻力大大降低，而升力几乎不受影响。在受控情况下，负责的流量变化的物理机制进行了讨论。
Large eddy simulations are performed to study deep dynamic stall of a SD7003 airfoil in plunging motion. The numerical computations employ a suit of high-order compact schemes for computing derivatives, interpolation and filtering on a staggered grid. The SD7003 profile undergoes a plunge motion at Reynolds number Re = 60,000, Mach number M = 0.1, reduced frequency k = 0.5 and amplitude h0 = 0.5. A mesh convergence study is performed and results show good agreement with available data in terms of aerodynamic coefficients. Flow actuation is then applied at the airfoil leading edge and we observe that, for a specific frequency range of actuation, the airfoil drag is substantially reduced while the lift is maintained almost unaffected. The physical mechanisms responsible for the flow changes in the controlled case are then discussed.