A Two-Dimensional Model of the Fluid Dynamics of an Air Reverser

[+] Author and Article Information
S. Müftü

Massachusetts Institute of Technology, Haystack Observatory, Westford, MA 01886

T. S. Lewis

Eastman Kodak Company, Engineering Research Center, 901 Elmgrove Road, Rochester, NY 14653

K. A. Cole

Eastman Kodak Company, Web Dynamics Group, Building 10, Kodak Park, Rochester, NY 14652

R. C. Benson

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

J. Appl. Mech 65(1), 171-177 (Mar 01, 1998) (7 pages) doi:10.1115/1.2789021 History: Received September 30, 1996; Revised July 24, 1997; Online October 25, 2007


A theoretical analysis of the fluid mechanics of the air cushion of the air reversers used in web-handling systems is presented. A two-dimensional model of the air flow is derived by averaging the equations of conservation of mass and momentum over the clearance between the web and the reverser. The resulting equations are Euler’s equations with nonlinear source terms representing the air supply holes in the surface of the reverser. The equations are solved analytically for the one-dimensional case and numerically for the two-dimensional case. Results are compared with an empirical formula and the one-dimensional airjet theory developed for hovercraft. Conditions that maximize the air pressure supporting the web are analyzed and design guidelines are deduced.

Copyright © 1998 by The American Society of Mechanical Engineers
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