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RESEARCH PAPERS: Forced Convection

Heat Transfer and Flow Characteristics of an Oblique Turbulent Impinging Jet Within Confined Walls

[+] Author and Article Information
K. Ichimiya

Department of Mechanical System Engineering, Yamanashi University, Takeda-4, Kofu, Yamanashi, 400 Japan

J. Heat Transfer 117(2), 316-322 (May 01, 1995) (7 pages) doi:10.1115/1.2822523 History: Received October 01, 1993; Revised April 01, 1994; Online December 05, 2007

Abstract

Experiments were conducted to determine the turbulent heat transfer and flow characteristics of an oblique impinging circular jet within closely confined walls using air as a working fluid. The local temperature distribution on the impingement surface was obtained in detail by a thermocamera using a liquid crystal sheet. A correction to the heat flux was evaluated by using the detailed temperature distribution and solving numerically the three-dimensional equation of heat conduction in the heated section. Two-dimensional profiles of the local Nusselt numbers and temperatures changed with jet angle and Reynolds number. These showed a peak shift toward the minor flow region and a plateau of the local heat transfer coefficients in the major flow region. The local velocity and turbulent intensity in the gap between the confined insulated wall and impingement surface were also obtained in detail by a thermal anemometer.

Copyright © 1995 by The American Society of Mechanical Engineers
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