High lift airfoil leading edge separation control with nanosecond pulse driven DBD plasma actuators

Jesse Little, Keisuke Takashima, Munetake Nishihara, Igor Adamovich, Mo Samimy

研究成果: 書籍の章/レポート/Proceedings会議への寄与査読

47 被引用数 (Scopus)

抄録

The efficacy of dielectric barrier discharge (DBD) plasmas driven by repetitive nanosecond (NS) pulses for flow separation control is investigated experimentally on an airfoil leading edge up to Re=1×106 (62 m/s). The NS pulse driven DBD plasma actuator (NS-DBD hereafter) transfers very little momentum to the neutral air, but generates compression waves similar to localized arc filament plasma actuators. Experimental results indicate that NS-DBD plasma performs as an active trip at pre-stall angles of attack and provides high amplitude perturbations that manipulate flow instabilities and generate coherent spanwise vortices at post-stall angles. These coherent structures entrain freestream momentum thereby reattaching the normally separated flow to the suction surface of the airfoil. Such devices which are believed to function through thermal effects could result in a significant improvement over AC-DBD plasmas that rely on momentum addition which limits their performance at high speeds.

本文言語英語
ホスト出版物のタイトル5th Flow Control Conference
出版ステータス出版済み - 2010
イベント5th Flow Control Conference - Chicago, IL, 米国
継続期間: 2010 6月 282010 7月 1

出版物シリーズ

名前5th Flow Control Conference

会議

会議5th Flow Control Conference
国/地域米国
CityChicago, IL
Period10/6/2810/7/1

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