Title: Computational and experimental study of the orifice discharge coefficient influenced by the presence of a rigid plate

Authors: Clement Tang, Young Chang

Addresses: School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USA. ' Department of Mechanical Engineering Technology, Oklahoma State University, Stillwater, OK 74078, USA

Abstract: The effect of an impingement plate on the discharge coefficient of a circular hole was investigated. A commercial fluid dynamics package was used, and the computational results were verified experimentally for selected cases. The discharge coefficient was strongly affected by the air gap only when it was small (less than the radius of the orifice). This study can be applied to the flotation of a thin film at the air reverser or other fluid-structure problems, where a coated film or wet paper is supported by air cushion for non-contact support or drying.

Keywords: air reverser; flotation; discharge coefficient; drying; web; impingement plates; circular holes; computational fluid dynamics; CFD; orifice discharge; thin films; air cushion.

DOI: 10.1504/PCFD.2007.015776

Progress in Computational Fluid Dynamics, An International Journal, 2007 Vol.7 No.8, pp.439 - 446

Published online: 14 Nov 2007 *

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