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Experimental investigation of flow and heat transfer characteristics on matrix ribbed channel

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posted on 21.02.2020, 14:46 by Bo Zhang, Quan Hong, Yuanyuan Dou, Honghu Ji, Rui ChenRui Chen
The effect of the rib width to height ratio t/e and width to pitch ratio t/p on the local heat transfer distribution in a rectangular matrix ribbed channel with two opposite in line o 45 ribs are experimentally investigated for Reynolds Numbers from 54000 to 150000. The rib height to channel height ratio e/H is 0.5, t/p and t/e both varies in range of 0.3-0.5. And to simulate the actually situation in turbine blades, and provide useful direct results for turbine blade designers, the parameters are same with the blade. The experiments results show that, in comparison to fully developed flow in a smooth pipe of equivalent hydraulic diameter, the Nusselt number inside the matrix-ribbed rectangular channel is increased up to 5 to 9 times higher, while total pressure drop is enlarged by up to significant magnitude. The Nusselt number ratio increases with t/p and t/e increased. Semi-empirical heat transfer is developed for designing of cooling channel.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Thermal Science

Issue

00

Pages

26 - 26

Publisher

National Library of Serbia

Version

VoR (Version of Record)

Rights holder

© The Author

Publisher statement

This is an Open Access Article. It is published by National Library of Serbia under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2020

ISSN

0354-9836

eISSN

2334-7163

Language

en

Depositor

Prof Rui Chen Deposit date: 20 February 2020

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