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research-article

A COMBINED EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE FLOW AND HEAT TRANSFER INSIDE A TURBINE VANE COOLED BY JET IMPINGEMENT

[+] Author and Article Information
Emmanuel Laroche

ONERA, The French Aerospace Lab, F31055, Toulouse, France
emmanuel.laroche@onera.fr

Matthieu Fenot

PPRIME Institute, Chasseneuil Futuroscope, France
matthieu.fenot@ensma.fr

Eva Dorignac

PPRIME Institute, Chasseneuil Futuroscope, France
eva.dorignac@ensma.fr

Jean-Jacques Vuillerme

PPRIME Institute, Chasseneuil Futuroscope, France
jean-jacques.vullierme@wanadoo.fr

Laurent-emmanuel Brizzi

PPRIME Institute, Chasseneuil Futuroscope, France
laurent.brizzi@univ-poitiers.fr

Juan-Carlos Larroya

Safran Aircraft Engines, Moissy Cramayel, France
juan-carlos.larroya-huguet@snecma.fr

1Corresponding author.

ASME doi:10.1115/1.4038411 History: Received September 08, 2017; Revised November 03, 2017

Abstract

The present study aims at characterizing the flow field and heat transfer for a schematic but realistic vane cooling scheme. Experimentally, both velocity and heat transfer measurements are conducted to provide a detailed database of the investigated configuration. From a numerical point of view, the configuration is investigated using isotropic as well as anisotropic Reynolds-Averaged Navier-Stokes (RANS) turbulence models. An hybrid RANS/LES technique is also considered to evaluate potential unsteady effects. Both experimental and numerical results show a very complex 3D flow. Air is not evenly distributed between the different injections, mainly because of a large recirculation flow. Due to the strong flow deviation at the hole inlet, the velocity distribution and the turbulence characteristics at the hole exit are far from fully developed profiles. The comparison between PIV measurements and numerical results shows a reasonable agreement. However, coming to heat transfer, all RANS models exhibit a major overestimation compared to IR thermography measurements. The Billard-Laurence model does not bring any improvement compared to a classical k-? SST model. The hybrid RANS/LES simulation provides the best heat transfer estimation, exhibiting potential unsteady effects ignored by RANS models. Those conclusions are different from the ones usually obtained for a single fully developed impinging jet.

Copyright (c) 2017 by ASME
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