RESEARCH PAPERS: Additional Technical Papers

Some Problems in Winding Geometry

[+] Author and Article Information
M. M. Schoppee

Albany International Research Co., Dedham, Mass.

J. Eng. Ind 103(4), 418-423 (Nov 01, 1981) (6 pages) doi:10.1115/1.3184506 History: Received June 15, 1981; Online July 30, 2009


The efficiency of wound, hollow-fiber separation modules used to remove dissolved salts from water by the process of reverse osmosis may be improved by alterations in module geometry. Normally, the hollow-fiber membranes composing the module are helically wound about a cylindrical core. Flow rate through the module may be increased, however, if the cross-sectional density of wound fibers varies uniformly along the module axis. This paper explores the analytical requirements for the helical winding of a conical mandrel with filamentary material in a manner that eventually produces a cylindrically shaped package. The effect of specifying either a constant yarn feed rate or a constant spindle speed during winding is considered in relation to restrictions on the length of material added per circuit.

Copyright © 1981 by ASME
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