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RESEARCH PAPERS: Forced Convection

An Analytical Model for Turbulent Compression-Driven Heat Transfer

[+] Author and Article Information
F. J. Cantelmi

Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08855-0909

D. Gedeon

Gedeon Associates, 16922 South Canaan Road, Athens, OH 45701

A. A. Kornhauser

Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238

J. Heat Transfer 120(3), 617-623 (Aug 01, 1998) (7 pages) doi:10.1115/1.2824319 History: Received August 04, 1997; Revised April 13, 1998; Online December 05, 2007

Abstract

Compression-driven heat transfer is important to the performance of many reciprocating energy-conversion machines. For small pressure variations in cylinder spaces without inflow, heat transfer and power losses are well predicted using a simple heat transfer model which neglects turbulence. In actual engine cylinders, where significant turbulence levels can be generated by high-velocity inflow, a model which neglects turbulence may not be adequate. In this paper, a heat transfer model having an analytical solution is developed for turbulent cylinder spaces based on a mixing length turbulence model. The model is then used to develop expressions for heat-transfer-related power loss and heat transfer coefficient. Predicted results compare favorably with experimental data for two in-flow configurations.

Copyright © 1998 by The American Society of Mechanical Engineers
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