Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

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2005, Volume12

Issue 4

142 pages

DOI: 10.1615/JFlowVisImageProc.v12.i4

Issue price - $154.00

Shuichi Torii
Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065; and Department of Mechanical Engineering and Materials Science, Kumamoto University 2-39-1, Kurokami, Kumamoto, 860-8555, JAPAN

Wen-Jei Yang
Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan 48109, U.S.A.

This paper investigates the secondary flow and heat transfer characteristics in an axially rotating passage in the presence of twin concentric orifices. Emphasis is placed on the effects of pipe rotation and orifice configuration on the flow and thermal fields, i.e., both the formation of vena contracta and the heat-transfer performance behind each orifice. The governing equations are discretized by means of a finite-difference technique and are numerically solved for the distributions of velocity vector and fluid temperature subject to constant wall temperature and uniform inlet velocity and fluid temperature. It is found that: (i) for a laminar flow through twin concentric orifices in a pipe, axial rotation causes the vena contracta in the orifice to stretch, resulting in an amplification of heat-transfer performance in the downstream region behind the rear orifice, and (ii) the local heat-transfer performance between the twin orifices is affected by an orifice interval, even if the orifice height and pipe rotation rate are the same. Results may find applications in automotive and rotating hydraulic transmission lines.

DOI: 10.1615/JFlowVisImageProc.v12.i4.10 Download article, 331-342 pages

Article price - $35.00

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