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CONTROL OF THE WAKE BEHIND A DISK USING ELECTRO-MAGNETIC ACTUATORS

Hiroshi Higuchi
Department of Mechanical, Aerospace and Manufacturing Engineering, Syracuse University, Syracuse, New York 13244-1240, USA

Jinhao Qiu
Institute of Fluid Science Tohoku University Sendai, 980, Japan

Gerald Gandelin
Institute of Fluid Science Tohoku University Sendai, 980, Japan

Junji Tani
Institute of Fluid Science Tohoku University Sendai, 980, Japan

Abstract

Open-loop response of the wake behind an actuator-equipped disk was experimentally investigated. The disk edge had flush-mounted tabs that moved radially in specified frequency and relative phase using electro-magnetic actuators. In spite of small amplitude of tab motion, significant modification of the helical mode of wake oscillation was observed.