Modern design of turbine blades usually requires highly loaded, very thin profiles in order to save weight and cost. If local leading edge incidence is kept close to zero, then flow separation might occur on the pressure side. Although it is known that flow separation, flow reattachment, and the associated zones of recirculation have a major impact on the heat transfer to the wall, the turbomachinery community needs an understanding of the heat transfer mechanisms in separated flows as well as models and correlations to predict them. The aim of the present investigation is a detailed study by means of an in-house CFD code, of the heat transfer mechanisms in separated flows, in particular in separation and reattachment point regions. Furthermore, an attempt is made to identify a limited number of parameters (i.e., Re, M, inlet flow angle, etc.) whose influence on the heat flux would be critical. The identification of these parameters would be the starting point to develop special correlations to estimate the heat transfer in separated flow regions.
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April 2003
Technical Papers
Numerical Investigation of Heat Transfer in Turbine Cascades With Separated Flows
A. Alonso
A. Alonso
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P. de la Calzada
A. Alonso
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI September 27, 2001. Paper No. 2002-GT-30225. Review Chair: E. Benvenuti.
J. Turbomach. Apr 2003, 125(2): 260-266 (7 pages)
Published Online: April 23, 2003
Article history
Received:
September 27, 2001
Online:
April 23, 2003
Citation
de la Calzada, P., and Alonso, A. (April 23, 2003). "Numerical Investigation of Heat Transfer in Turbine Cascades With Separated Flows ." ASME. J. Turbomach. April 2003; 125(2): 260–266. https://doi.org/10.1115/1.1556014
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