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首页> 外文期刊>Aerospace science and technology >Cycloidal rotor coupled with DBD plasma actuators for performance improvement
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Cycloidal rotor coupled with DBD plasma actuators for performance improvement

机译：摆线转子与DBD等离子体致动器联接，用于性能改进

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This study analyzes the effect of DBD plasma actuators on the unsteady flow of a cycloidal rotor with six blades of NACA 0016 type using computational fluid dynamics (CFD). The flow field modeling is performed through a sliding mesh technique that was used with k-.SST turbulence model. The plasma body force generated by a dielectric barrier discharge DBD actuator is modeled with the phenomenological Shyy's model. The impact of plasma actuators on the flow is studied using two actuators located on the upper and bottom surfaces of the airfoil in each of the cyclorotor blades. Three cases are studied: actuation off; actuation over the upper surface of the blades; actuation over the bottom surface of the blades. The vorticity field and the evolution of the lift, thrust and power consumption are analyzed for when a control law is designed that combines both actuations based on the two last cases. The results show that the use of the proposed control law for plasma actuation improves the cyclorotor lift peak value per blade in 11% and the overall thrust by 1.5%. It is also demonstrated that the plasma actuator mitigates the virtual camber on the cyclorotor, this effect is named counter-virtual camber. We show that DBD actuators produce a reduction on the recirculation bubble at the blades suction surface. This effect is important to reduce the thickness of the blades, bringing improvements in terms of mitigating unsteady periodic mass acceleration in cyclorotors. (C) 2021 Elsevier Masson SAS. All rights reserved.
机译：该研究分析了DBD等离子体致动器对使用计算流体动力学（CFD）的六片Naca 0016类型的摆线转子的不稳定流动的影响。流场建模是通过与K-.SST湍流模型一起使用的滑动网格技术进行的。由介电阻挡放电DBD致动器产生的等离子体体力与现象学舍y的模型建模。使用位于翼型的翼型的上部和底表面上的两个致动器研究了等离子体致动器对流动的影响。研究了三种情况：驱动;在叶片的上表面上的致动;在刀片的底表面上致动。分析了控制法基于最后两个案例的控制定律设计了控制定律时，对升力，推力和功耗的演变进行了分析。结果表明，使用所提出的血浆致动的控制法改善了每叶片的环旋翼率升降峰值11％，整体推动率为1.5％。还证明了等离子体执行器在环绕机上降低了虚拟弧形，这种效果被命名为反虚拟露角。我们表明DBD执行器在叶片抽吸表面处产生减少的再循环气泡。这种效果对于降低叶片的厚度是重要的，从而提高了环球体中的不稳定周期性加速度。 （c）2021 Elsevier Masson SAS。版权所有。

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