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A hybrid LES-RANS validation of effusion cooling array measurements

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conference contribution
posted on 11.09.2017, 12:50 authored by Xiao-Sheng (Shaun) Chen, Hao XiaHao Xia
In this work, an effusion cooling array is studied using a hybrid LES-RANS approach under combustor representative conditions. The surface adiabatic cooling effectiveness is examined. Promising results are obtained from the hybrid LES approach based on an 18-million-cell grid. The turbulent flow field is studied in order to investigate the effects on the coolantmainstream mixing, as well as the distribution of the coolant film. It is found that the freestream turbulence leads to early breakdown of the coolant jets at the 1st and 2nd row of coolant holes, while such effects diminish in the downstream region due to the turbulent structures in the mixed mainstream. As a result, the surface adiabatic cooling effectiveness stays low in the first few rows, but keeps growing and reaches a high value in the downstream rows.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

23rd International Society of Air-breathing Engines (ISABE) Conference

Citation

CHEN, X. and XIA, H., 2017. A hybrid LES-RANS validation of effusion cooling array measurements. Presented at the 23rd International Society of Air-breathing Engines (ISABE) Conference, Manchester, 3-8th September.

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of 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/

Acceptance date

30/04/2017

Publication date

2017

Notes

This is a conference paper.

ISBN

9788894248470

Publisher version

Book series

ISABE-2017-22637

Language

en

Location

Manchester

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