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首页> 外文OA文献 >Effects of Input Voltage and Freestream Velocity on Active Flow Control of Passage Vortex in a Linear Turbine Cascade Using Dielectric Barrier Discharge Plasma Actuator
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Effects of Input Voltage and Freestream Velocity on Active Flow Control of Passage Vortex in a Linear Turbine Cascade Using Dielectric Barrier Discharge Plasma Actuator

机译：输入电压和FreeStream速度对使用介质屏障放电等离子体致动器的线性涡轮机级联通道涡流的主动流量控制的影响

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Passage vortex exists as one of the typical secondary flows in turbomachines and generates a significant total pressure loss and degrades the aerodynamic performance. Herein, a dielectric barrier discharge (DBD) plasma actuator was utilized for an active flow control of the passage vortex in a linear turbine cascade. The plasma actuator was installed on the endwall, 10 mm upstream from the leading edge of the turbine cascade. The freestream velocity at the outlet of the linear turbine cascade was set to range from UFS,out = 2.4 m/s to 25.2 m/s, which corresponded to the Reynolds number ranging from Reout = 1.0 × 104 to 9.9 × 104. The two-dimensional velocity field at the outlet of the linear turbine cascade was experimentally analyzed by particle image velocimetry (PIV). At lower freestream velocity conditions, the passage vortex was almost negligible as a result of the plasma actuator operation (UPA,max/UFS,out = 1.17). Although the effect of the jet induced by the plasma actuator weakened as the freestream velocity increased, the magnitude of the peak vorticity was reduced under all freestream velocity conditions. Even at the highest freestream velocity condition of UFS,out = 25.2 m/s, the peak value of the vorticity was reduced approximately 17% by the plasma actuator operation at VAC = 15 kVp-p (UPA,max/UFS,out = 0.18).
机译：通过涡流作为涡轮机中的典型二次流动之一，并产生显着的总压力损失，并降低空气动力学性能。这里，利用介电阻挡放电（DBD）等离子体致动器用于线性涡轮机级联中的通道涡流的主动流量控制。等离子体致动器安装在端壁上，从涡轮机级联的前缘上游10毫米。线性涡轮机级联出口处的FreeStream速度设定为UF的范围，Out = 2.4 m / s至25.2m / s，与Reout = 1.0×104至9.9×104的雷诺数相对应。这两个通过颗粒图像速度（PIV）实验分析了线性涡轮机级联的出口处的尺寸速度场。在较低的Freesteam速度条件下，由于等离子执行器操作（UPA，MAX / UF，OUT = 1.17），通道涡流几乎可以忽略不计。虽然由自由流速度增加，等离子体致动器引起的喷射的效果削弱，但在所有自由流速度条件下，峰值涡度的大小减小。即使在UF的最高自由流速条件下，OUT = 25.2M / s，VAV = 15 kVP-P的等离子致动器操作（UPA，MAX / UF，OUT = 0.18），涡流的峰值也减少了约17％的峰值约为17％ ）。

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