Flow structure comparison of film cooling versus hybrid cooling: a CFD study-Reference-Cited by-同舟云学术

Flow structure comparison of film cooling versus hybrid cooling: a CFD study

Published:2023-05-10 Issue:0 Volume:0 Page:
ISSN:0334-0082
Container-title:International Journal of Turbo & Jet-Engines
language:en
Short-container-title:

Author:

Panda Rajesh Kumar¹,Pujari Arun Kumar²,Gudla Babji²^ORCID

Affiliation:

1. Indian Institute of Technology, Madras , Chennai , 600036 , Tamilnadu , India

2. Indian Institute of Petroleum and Energy , Visakhapatnam , 530003 , Andhra Pradesh , India

Abstract

Abstract Film and jet impingement cooling are widely used techniques in gas turbine vane and blade cooling. The present work investigates and compares the flow structure of a film-cooled flat plate with a hybrid cooling scheme. The hybrid cooling scheme combines both impingement hole and film holes and is named combined impingement-film (IFC) cooling. Experimental validation and computational analyses are carried out on a flat plate with film holes. Different flow parameters, such as velocity pattern, Turbulent kinetic energy, and streamline flow structure, are compared for the two cases in different regions of the flat plate. It is observed that the hybrid scheme shows advantages over film cooling. The jet-to-jet interaction, jet crossflow interaction, and vortex formation are the main factors affecting film cooling performance. There is a 52 % drop in turbulent kinetic energy for the hybrid cooling compared to the film cooling at the film hole exit. More mixing in the coolant and mainstream interaction is observed for the FC case than in the IFC.

Publisher

Walter de Gruyter GmbH

Subject

Aerospace Engineering

Link

https://www.degruyter.com/document/doi/10.1515/tjj-2022-0058/pdf

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