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首页> 外文期刊>Journal of aerospace engineering >Separated-Flow Control Simulation with a Periodic Excitation by SDBD Plasma Actuator at Re = O(20_5)
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Separated-Flow Control Simulation with a Periodic Excitation by SDBD Plasma Actuator at Re = O(20_5)

机译：分离的流量控制模拟，通过RE = O的SDBD等离子体致动器进行周期性激励（20_5）

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This work presents a boundary layer separated-flow control technique with a periodic excitation by an single dielectric-barrier discharge (SDBD) plasma actuator applied to an airfoil section at Re=O(205). The technique uses the Reynolds-averaged Navier-Stokes method to study the induced flow control through a body force source modeled by an SDBD plasma actuator, which is implemented in an OpenFOAM platform for free instability flow simulation. To simulate the coupling of plasma-fluid physics of a SDBD, the Kloker plasma-fluid model was used in conjunction with the k - omega SST turbulence model. Several numerical setups of OpenFOAM were tested, stable solutions were achieved with the pimpleFoam solver, second-order accurate discretization schemes a linear solver GAMG for the symmetric matrix p, and a smoothSolver with a GaussSeidel smoother for the asymmetric matrices U, k, omega, and nuTilda. The flow solver determines the pressure, velocity, and stall point including the detachment of the boundary layer for different angle attacks of the airfoil section. The resulting periodic excitation causes an efficient transversal redistribution of the main flow momentum into the boundary layer motivating the further flow reattachment to the airfoil section. The burst frequency of 3 Hz with a C-mu = 1.44 x 10(-3) and a BR = 0.5 achieves a smooth and continuous increase Cl behavior, and the frequency variations do not have a noticeable impact over the Cd, extending the airfoil section stall beyond 16 degrees. (c) 2020 American Society of Civil Engineers.
机译：该工作介绍了一个边界层分离的流量控制技术，通过施加到Re = O（205）的翼型部分的单个介电阻挡放电（SDBD）等离子体致动器的周期性激发。该技术使用雷诺平均的Navier-Stokes方法来研究诱导的流量控制通过由SDBD等离子体致动器建模的体力源进行研究，该体力源位于OpenFoam平台中实现，用于游离不稳定流程模拟。为了模拟SDBD等离子体流体物理的耦合，Kloker等离子体流体模型与K - Omega SST湍流模型结合使用。测试了几种OpenFoam的数值设置，利用PimpleFoam求解器实现了稳定的解决方案，二阶精确离散化方案为对称矩阵P的线性求解器GAMG，以及用于不对称矩阵U，K，Omega的高斯海太般的平滑轿车滑动器。和坚果。流动求解器确定压力，速度和档位，包括用于翼型部分的不同角度攻击的边界层的分离。由此产生的周期性激发导致主流动量的有效横向再分布在促进进一步的流动部分到翼型部分的边界层中。具有C-Mu = 1.44×10（-3）和Br = 0.5的3 Hz的突发频率达到平滑和连续的CL行为，并且频率变化对CD具有明显的影响，延伸翼型部分档位超过16度。 （c）2020年美国土木工程师协会。

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