Influence of discharge energy on the lift and drag forces induced by a nanosecond-pulse-driven plasma actuator
Influence of discharge energy on the lift and drag forces induced by a nanosecond-pulse-driven plasma actuator
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DOI：
10.1088/1361-6595/ab1daf
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发表时间：
2019-06
影响因子：
3.8
通讯作者：
A. Komuro;K. Takashima;Kento Suzuki;Shoki Kanno;T. Nonomura;T. Kaneko;A. Ando;K. Asai
中科院分区：
文献类型：
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作者：
A. Komuro;K. Takashima;Kento Suzuki;Shoki Kanno;T. Nonomura;T. Kaneko;A. Ando;K. Asai
在40 m s-1的气流速度下，在翼型上使用纳秒脉冲驱动等离子体激励器（ns-DBDPA）进行了风洞实验，以（i）研究引起ns-DBDPA流动控制效应的放电参数和（ii）研究代表引起的放电-流动相互作用的放电介导流动参数。升力和阻力的测量结果表明，除了众所周知的频率效应之外，每脉冲放电能量可以是代表ns-DBDPA对力的影响的关键放电参数，而不是在每脉冲放电能量提高到80 mJ m−1和放电频率范围从10到1600 Hz的各种放电功率下的放电功率。在一个单一的脉冲操作的放电频率的影响，纹影成像和粒子图像测速表明，由ns-DBDPA产生的两个加热区的动态是相同的诱导两个漩涡。在无频率条件下观察到的这种放电-流动相互作用意味着关键的放电介导流动参数可以在于加热区的相同动力学。这项研究表明，放电介导的流量参数的放电-流量相互作用，导致流量控制效果的力量可以是一个统计变化的纹影图像强度或角度的加热区的轨迹。
Wind tunnel experiments at a flow velocity of 40 m s−1 with a nanosecond-pulse-driven plasma actuator (ns-DBDPA) on an airfoil have been performed (i) to study discharge parameters inducing the ns-DBDPA flow control effect and (ii) to investigate discharge-mediating flow parameters representing the induced discharge-flow interactions. The lift and drag forces’ measurements demonstrate that, in addition to the well-known frequency effect, the discharge energy per pulse can be the key discharge parameter representing the ns-DBDPA effect on the forces rather than the discharge power under various discharge energy per pulse raised up to 80 mJ m−1 and discharge frequencies ranged from 10 to 1600 Hz. In a single pulse operation free from the discharge frequency effect, Schlieren imaging and particle image velocimetry show that the dynamic of two heated zones generated by ns-DBDPA is identical to those of the induced two vortices. This discharge-flow interaction observed under the frequency-free condition implies that the key discharge mediating flow parameter can lie in the identical dynamics of the heated zones. This study suggests that the discharge-mediating flow parameters for the discharge-flow interaction leading to the flow control effect on the forces can be a statistical variation in the Schlieren image intensity or the angles of the heated zones’ trajectories.