Experimental and numerical POD study of the Coanda effect used to reduce self-sustained tones

摘要

The two-dimensional flow along an inclined plate may be detached or reattached to the plate by Coanda effect. Experimentally, we explore the influence of the inclination angle and of the Reynolds number on the attachment and detachment phenomena, and on the hysteresis loop. A proper orthogonal decomposition (POD) of the flow is applied to a LES simulation resulting data. A low-dimensional dynamical model is obtained using by Galerkin projection of the Navier-Stokes equations upon the POD basis functions. We show that this model represents qualitatively the characteristics of the flow. (C) 2003 Elsevier Ltd. All rights reserved.