Experimental investigation of turbulent heat transfer in straight and curved rectangular ducts.

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Authors
Galyo, George Gregory
Subjects
NA
Taylor-Gortler vortices
dean number
heat transfer
turbulent flow
rectangular curved channel
rectangular straight channel
secondary flow
concave
convex
Advisors
Kelleher, Matthew D.
Date of Issue
1985-12
Date
December 1985
Publisher
Language
en_US
Abstract
An experimental apparatus has been constructed and tested to examine the convective heat transfer in straight and curved ducts of rectangular cross-section. The channel can be configured with both walls independently heated at a constant heat flux, or one wall at a constant heat flux and the opposite wall adiabatic. Local and average Nusselt numbers can be calculated, and used to evaluate the effect of curvature on heat transfer. Experiments were conducted at steady state for turbulent flow with one wall heated at a constant heat flux and the opposite wall adiabatic. The heat transfer characteristics of the straight and curved sections, on both the inner and outer walls, were compared. The heat transfer rate of the concave curved wall proved to be enhanced over both the convex curved wall and both straight sections.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
109 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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