NDLI: Cfd analyses of coolant channel flowfields

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Cfd analyses of coolant channel flowfields

Content Provider	NASA Technical Reports Server (NTRS)
Author	Yagley, Jennifer A. Merkle, Charles L. Feng, Jinzhang
Copyright Year	1993
Description	The flowfield characteristics in rocket engine coolant channels are analyzed by means of a numerical model. The channels are characterized by large length to diameter ratios, high Reynolds numbers, and asymmetrical heating. At representative flow conditions, the channel length is approximately twice the hydraulic entrance length so that fully developed conditions would be reached for a constant property fluid. For the supercritical hydrogen that is used as the coolant, the strong property variations create significant secondary flows in the cross-plane which have a major influence on the flow and the resulting heat transfer. Comparison of constant and variable property solutions show substantial differences. In addition, the property variations prevent fully developed flow. The density variation accelerates the fluid in the channels increasing the pressure drop without an accompanying increase in heat flux. Analyses of the inlet configuration suggest that side entry from a manifold can affect the development of the velocity profile because of vortices generated as the flow enters the channel. Current work is focused on studying the effects of channel bifurcation on the flow field and the heat transfer characteristics.
File Size	396637
Page Count	5
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940018577
Archival Resource Key	ark:/13960/t20c9w047
Language	English
Publisher Date	1993-11-01
Access Restriction	Open
Subject Keyword	Spacecraft Propulsion And Power Engine Coolants Computational Fluid Dynamics Vortices Flow Distribution Flow Characteristics Rocket Engines Mathematical Models Velocity Distribution Channel Flow Secondary Flow Heat Transfer Heat Flux Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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