The increase of aeroengine performance through the improvement of aerodynamic efficiency of core flow is becoming more and more difficult to achieve. However, there are still some devices that could be improved to enhance global engine efficiency. Particularly, investigations on the internal air cooling systems may lead to a reduction of cooling air with a direct benefit to the overall performance. At the same time, further investigations on heat transfer mechanisms within turbine cavities may help to optimize cooling air flows, saving engine life duration. This paper presents a computational fluid dynamics (CFD) study aimed at the characterization of the effects of different geometries for cooling air supply within turbine cavities on wall thermal effectiveness and sealing mass flow rate. Several sealing air supply geometries were considered in order to point out the role of cooling air injection position, swirl number, and jet penetration on the cavities’ sealing performance. Steady state calculations were performed using two different computational domains: the first consists of a sector model of the whole turbine including the second stator well, while the second is a cut-down model of the stator well. Thanks to the simplified geometry of the test rig with respect to actual engines, the study has pointed out clear design suggestions regarding the effects of geometry modification of cooling air supply systems.
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April 2011
Research Papers
Turbine Stator Well CFD Studies: Effects of Coolant Supply Geometry on Cavity Sealing Performance
Antonio Andreini,
Antonio Andreini
Department of Energy Engineering “S. Stecco,”
University of Florence
, Via S. Marta 3, Florence 50139, Italy
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Riccardo Da Soghe,
Riccardo Da Soghe
Department of Energy Engineering “S. Stecco,”
e-mail: riccardo.dasoghe@htc.de.unifi.it
University of Florence
, Via S. Marta 3, Florence 50139, Italy
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Bruno Facchini
Bruno Facchini
Department of Energy Engineering “S. Stecco,”
University of Florence
, Via S. Marta 3, Florence 50139, Italy
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Antonio Andreini
Department of Energy Engineering “S. Stecco,”
University of Florence
, Via S. Marta 3, Florence 50139, Italy
Riccardo Da Soghe
Department of Energy Engineering “S. Stecco,”
University of Florence
, Via S. Marta 3, Florence 50139, Italye-mail: riccardo.dasoghe@htc.de.unifi.it
Bruno Facchini
Department of Energy Engineering “S. Stecco,”
University of Florence
, Via S. Marta 3, Florence 50139, ItalyJ. Turbomach. Apr 2011, 133(2): 021008 (11 pages)
Published Online: October 21, 2010
Article history
Received:
July 20, 2009
Revised:
July 27, 2009
Online:
October 21, 2010
Published:
October 21, 2010
Citation
Andreini, A., Da Soghe, R., and Facchini, B. (October 21, 2010). "Turbine Stator Well CFD Studies: Effects of Coolant Supply Geometry on Cavity Sealing Performance." ASME. J. Turbomach. April 2011; 133(2): 021008. https://doi.org/10.1115/1.4000570
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