Decaying of flow separation from a low Reynolds number airfoil with high frequency perturbations

摘要：

Piezo-ceramic actuators were used to decay boundary layer separation from a NACA0015airfoil. The actuators generated a small normal-to-surface perturbation near the leading edge of theairfoil. While the ow field around the airfoil was measured using a particle imaged velocimeter,instantaneous lift and drag forces were obtained using a load cell. The results show that the owseparation can be postponed by this perturbation as long as the perturbation frequency is high enough,say higher than 10 times of the dominant frequency of vortex shedding from the airfoil. It was foundthat the static-stall angle of attack can be extended by 1°-2° at the present Reynolds number of1.2×105

关键词： piezo-ceramic actuators ow separation control airfoil high frequency perturbation

作者: H.J.Zhang X.Y.Shi Y.Zhou L.Cheng Z.D.Su

作者单位: College of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310027,China, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）