标题：
On the effect of operating condition on separated-flow control by nanosecond pulse discharge actuators
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所属单位：
航空学院
发表刊物：
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
关键字：
Flow control plasma actuator airfoil flow separation dielectric barrier discharge
摘要：
The surface dielectric barrier discharge plasma actuator driven by nanosecond pulses is recognized as an effective fluid actuator for flow separation control. The operation condition of nanosecond dielectric barrier discharge actuators for separated flow control still requires further study, particularly prioritizing the improvement of the effectiveness and reducing energy consumption in flow separation control implementation. In this study, experiments are conducted using a two-dimensional NASA SC(2)-0712 airfoil in a wind tunnel with a Reynolds number of 0.5x10(6) (25m/s). The pressure measurement experiments show that the location of actuators affects the efficiency of separation control. Particle image velocimetry results indicate that the most efficient location of the actuator is upstream of the separation point and near the original point of the separated shear layer. Meanwhile, the particle image velocimetry results show the vorticity attaches to the airfoil wall after discharge, which suggests that the reattachment is due to the generation of large-scale vortices. These present structures result in the mixing of the shear layer with the main flow thereby delaying separation and reattaching a separated flow. This study shows the most efficient location related to the separation point. Furthermore, it indicates the reattachment of flow is attributed to the motion of vortexes coherent structure.
ISSN号：
0954-4100
是否译文：
否
发表时间：
2018-03-01
合写作者：
杜海,程克明,蒋璇,李铮
通讯作者：
史志伟
发表时间：
2018-03-01
学位：工学博士学位
职称：教授
所在单位：航空学院