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Title of Journal: Heat Mass Transfer

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Abbravation: Heat and Mass Transfer

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Springer Berlin Heidelberg

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DOI

10.1016/0305-0483(77)90101-3

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ISSN

1432-1181

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Experimental and numerical investigations of inter

Authors: Ahmed Beniaiche Adel Ghenaiet Bruno Facchini
Publish Date: 2016/05/17
Volume: 53, Issue: 2, Pages: 475-490
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Abstract

The aerothermal behavior of the flow field inside 301 scaled model reproducing an innovative smooth trailing edge of shaped wedge discharge duct with one row of enlarged pedestals have been investigated in order to determine the effect of rotation inlet velocity and blowing conditions effects for Re = 20000 and 40000 and Ro = 0–023 Two configurations are presented with and without open tip configurations Thermochromic liquid crystals technique is used to ensure a local measurement of the heat transfer coefficient on the blade suction side under stationary and rotation conditions Results are reported in terms of detailed 2D HTC maps on the suction side surface as well as the averaged Nusselt number inside the pedestal ducts Two correlations are proposed for both closed and open tip configurations based on the Re Pr Ro and a new nondimensional parameter based on the position along the radial distance to assess a reliable estimation of the averaged Nusselt number at the interpedestal region A good agreement is found between prediction and experimental data with about ±10 to ±12  of uncertainty for the simple form correlation and about ±16  using a complex form The obtained results help to predict the flow field visualization and the evaluation of the aerothermal performance of the studied blade cooling system during the design step

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