SUBSONIC AND TRANSONIC FLOW SIMULATION FOR A WING OSCILLATING IN YAW AND SIDESLIP

摘要

As is well known, the flutter speed of T-taildepends strongly on the steady lift or dihedralangle of the horizontal tail plane. The unsteadyrolling moment acting on the horizontal tailplane oscillating in yaw and sideslip plays thecritical roll for this phenomenon. In this paper,a numerical method based on the 3D Navier-Stokes equations for computing the subsonicand transonic flow for a wing oscillating in yawand sideslip is presented. By introducing a newcoordinate system oscillating in yaw andsideslip, the existing 3D Navier-Stokes code iseasily modified to account for the in-planemotions. The calculated rolling moments show agood agreement with the existing experimentaldata obtained for incompressible flow, and theeffect of compressibility, especially the effects ofthe shock wave in transonic flow on the rollingmoment are clarified.