Open Access

ARTICLE

TURBINE BLADE LEADING EDGE IMPINGEMENT COOLING FROM NORMAL OR TANGENTIAL JETS WITH CROSSFLOW EFFECT

Nian Wang, Mingjie Zhang, Sulaiman Alsaleem, Lesley M. Wright, Je-Chin Han^*

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, Texas, 77843, USA

* Corresponding Author: Email:

Frontiers in Heat and Mass Transfer 2019, 13, 1-13. https://doi.org/10.5098/hmt.13.9

Abstract

This study investigates turbine blade, leading edge cooling from normal or tangential impinging jets. These jets impinging on a semi-cylindrical, inner surface are constrained to discharge in a single direction. The downstream jets are affected by the crossflow originating from the upstream jets. To understand the thermal flow physics, numerical simulations are performed using the realizable k- turbulence model. Both the experimental and numerical results show crossflow is more detrimental to normal impinging jets than the tangential jets. Furthermore, with a significant temperature drop across the jet plate, designers must correctly interpret jet impingement results.

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Keywords

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