Numerical Investigation of Flow Control Feasibility with a Trailing Edge Flap

Numerical Investigation of Flow Control Feasibility with a Trailing Edge Flap
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后缘襟翼流量控制可行性的数值研究

DOI:
10.1088/1742-6596/524/1/012102
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发表时间:
2014-06
期刊:
Journal of Physics
影响因子:
--
通讯作者:
S?rensen JN
S?rensen JN
中科院分区:
其他
文献类型:
--
作者:
朱卫军;沈文忠;S?rensen JN

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本文对采用自适应后缘襟翼控制非定常来流条件下翼型升力进行了数值研究。周期性变化的流入是由位于受控翼型上游的两个振荡翼型产生的。为了建立控制系统,在基于有限体积的不可压缩流动求解器中实现了标准的PID控制器。采用浸没边界法处理可变形翼型后缘的数值模拟问题。流场采用二维雷诺平均N-S有限体积法求解。为了更准确地模拟浸没边界附近的壁面有界流动,在k-ω湍流模型中引入了修正的边界条件。作为例子,研究了具有可变形后缘的NACA-64418翼型的湍流流动。数值模拟的结果是令人信服的,可以为风力机叶片尾缘襟翼的实际应用提供一些亮点。
This paper concerns a numerical study of employing an adaptive trailing edge flap to control the lift of an airfoil subject to unsteady inflow conditions. The periodically varying inflow is generated by two oscillating airfoils, which are located upstream of the controlled airfoil. To establish the control system, a standard PID controller is implemented in a finite volume based incompressible flow solver. An immersed boundary method is applied to treat the problem of simulating a deformable airfoil trailing edge. The flow field is solved using a 2D Reynolds averaged Navier-Stokes finite volume solver. In order to more accurately simulate wall bounded flows around the immersed boundary, a modified boundary condition is introduced in the k- ω turbulence model. As an example, turbulent flow over a NACA 64418 airfoil with a deformable trailing edge is investigated. Results from numerical simulations are convincing and may give some highlights for practical implementations of trailing edge flap to a wind turbine rotor blade
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