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Experimental and numerical POD study of the Coanda effect used to reduce self-sustained tones. (English) Zbl 1045.76546

Summary: 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 resulting data. A low-dimensional dynamical model is obtained by using Galerkin projection of the Navier–Stokes equations upon the POD basis functions. We show that this model represents qualitatively the characteristics of the flow.

MSC:

76M25 Other numerical methods (fluid mechanics) (MSC2010)
76-05 Experimental work for problems pertaining to fluid mechanics
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