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RESEARCH PAPERS

A Study on Limiting Exit Quality of CHF of Forced Convection Boiling in Uniformly Heated Vertical Channels

[+] Author and Article Information
Y. Katto

Department of Mechanical Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan

J. Heat Transfer 104(1), 40-47 (Feb 01, 1982) (8 pages) doi:10.1115/1.3245066 History: Received April 03, 1981; Online October 20, 2009

Abstract

This paper presents the results from a phenomenological analysis of limited exit quality X°ex , that is, the occurrence of critical heat flux at a nearly constant exit quality X°ex independent of the change of inlet quality under mixed inlet condition. The author’s generalized correlation equations of CHF in uniformly heated channels with subcooled inlet condition are employed for this purpose, and the prediction of X°ex is compared with the existing data of X°ex satisfactorily. As a basis of the above-mentioned analysis, the applicability of the author’s correlation equations to the state near the critical length-to-diameter ratio corresponding to the limiting quality condition is also examined.

Copyright © 1982 by ASME
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