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RESEARCH PAPERS

Prediction of Heat Transfer From Laminar Boundary Layers, With Emphasis on Large Free-Stream Velocity Gradients and Highly Cooled Walls

[+] Author and Article Information
L. H. Back, A. B. Witte

Research and Advanced Concepts Section, Jet Propulsion Laboratory, Pasadena, Calif.

J. Heat Transfer 88(3), 249-256 (Aug 01, 1966) (8 pages) doi:10.1115/1.3691531 History: Received February 26, 1965; Revised May 24, 1965

Abstract

Laminar boundary-layer heat transfer and shear-stress predictions from existing similarity solutions are extended in an approximate way to perfect gas flows with a large free-stream velocity gradient parameter β and variable density-viscosity product ρμ across the boundary layer resulting from a highly cooled wall. The dimensionless enthalpy gradient at the wall gw, to which the heat flux is related, is found not to vary appreciably with β . Thus the application of similarity solutions on a local basis to predict heat transfer from accelerated flows to an arbitrary surface may be a reasonable approximation involving a minimum amount of calculation time. Unlike gw, the dimensionless velocity gradient at the wall fw, to which the shear stress is related, is strongly dependent on β .

Copyright © 1966 by ASME
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