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

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Authors
Daughety, Steven Floyd
Subjects
Taylor-Gortler vortices
Heat transfer
Secondary flow
Rectangular curved channel
Rectangular straight channel
Temsheet
Joulean heating
Turbulent flow
Advisors
Kelleher, Matthew D.
Date of Issue
1983-09
Date
September 1983
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
An experimental investigation was conducted to examine the convective heat transfer in straight and curved ducts of rectangular cross-section. The experimental configuration was modeled as infinite parallel plates with one wall at a constant temperature and the opposite wall adiabatic. The experiments were conducted at steady states for turbulent flow. Average Nusselt numbers were used to compare the heat transfer characteristics of the straight and curved sections. The development of Tayloe-Gortler vortices in the curved section was shown the enhance the heat transfer rate in the curved section as compared to the of the straight section by approximately 15 to 20 percent. Improved heat exchanger designs and improved cooling of turbine blades are two disciplines that could benefit from a better understanding of the effects of curvature on the rate of heat transfer.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
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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