标题：
Flow control for suppression of self-excited rolling oscillation at high angles of attack
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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：
Rolling oscillation ns-dielectric barrier discharge plasma actuator vortex generators flow control particle image velocimetry measurement
摘要：
A cruciform-finned slender body can excite a limit-cycle rolling oscillation at high angles of attack. To suppress the unwanted motions, flow control approaches should be employed if the aerodynamic control surfaces lose control efficiency at high angles of attack. As a promising technology, the ns-dielectric barrier discharge plasma actuator has been successfully used in high-speed and high-Reynolds-number flow control applications. The present work employs a -type ns-dielectric barrier discharge plasma actuator and vortex generators to suppress self-excited rolling oscillation at =50 degrees. The free-to-roll tests show that the plasma actuator ignited at F+approximate to 1.5 and that the vortex generators can suppress rolling oscillation. The flow patterns from particle image velocimetry measurement at different cross-sections and rolling angles suggest that the vorticity decrease of the leeward vortices may be the control mechanism for the plasma actuator. For the vortex generators, evident modification of the flow field structure can be observed due to the vortices generated from the vortex generators, which decreases the rolling moment induced by the asymmetry vortices to suppress the self-excited rolling oscillation.
ISSN号：
0954-4100
是否译文：
否
发表时间：
2017-11-01
合写作者：
耿玺,程克明,李铮
通讯作者：
史志伟
发表时间：
2017-11-01
学位：工学博士学位
职称：教授
所在单位：航空学院