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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

CHARACTERISTICS OF INTERACTING PROCESS WITH HORSESHOE VORTEX AND LONGITUDINAL VORTEX

Takaaki Shizawa
Department of Mechanical Engineering, Science University of Tokyo 1-3 Kagurazaka Shinjuku-ku, Tokyo 1628601, Japan

Shinji Honami
Department of Mechanical Engineering, Science University of Tokyo 1-3 Kagurazaka Shinjyuku-ku, Tokyo 162-8601, Japan

Mamoru Tanahashi
Department of Mechanical and Aerospace Engineering Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan

Hiroyuki Hara
Power System Engineering Center, Mitsubishi Heavy Industries, Ltd. 3-3-1 Minatomirai Yokohama-shi, Kanagawa 220-8401, Japan

Abstract

This paper presents the behavior of a passively controlled horseshoe vortex at the root of NACA0024 wing, which is established on a turbulent boundary layer. A pair of vortex generators of half delta wing is installed upstream of the wing. The characteristics of optimally controlled case of interacting process with longitudinal vortex and horseshoe vortex are carefully investigated. In case of Common Flow Up Configuration of vortex generator, the horseshoe vortex is not shifted from the wing, because the longitudinal vortex is restrained. In case of Common Flow Down Configuration, the interacting vortex that has strong vorticity by a pairing process is shifted far away from the wing, and the paring occurs in a short distance.