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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
Frontiers in Heat and Mass Transfer (FHMT) 13 - 9 (2019)


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-epsilon 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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DOI: http://dx.doi.org/10.5098/hmt.13.9

ISSN: 2151-8629