This paper presents a numerical investigation of the heat transfer inside a micro gas turbine and its impact on the performance. The large temperature difference between turbine and compressor in combination with the small dimensions results in a high heat transfer causing a drop in efficiency of both components. Present study aims to quantify this heat transfer and to reveal the different mechanisms that contribute to it. A conjugate heat transfer solver has been developed for this purpose. It combines a three-dimensional (3D) conduction calculation inside the rotor and the stator with a 3D flow calculation in the radial compressor, turbine and gap between stator and rotor. The results for micro gas turbines of different size and shape and different material characteristics are presented and the impact on performance is evaluated.
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e-mail: verstraete@vki.ac.be
e-mail: alsalihi@vki.ac.be
e-mail: vdb@vki.ac.be
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October 2007
Research Papers
Numerical Study of the Heat Transfer in Micro Gas Turbines
T. Verstraete,
e-mail: verstraete@vki.ac.be
T. Verstraete
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgium
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Z. Alsalihi,
e-mail: alsalihi@vki.ac.be
Z. Alsalihi
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgium
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R. A. Van den Braembussche
e-mail: vdb@vki.ac.be
R. A. Van den Braembussche
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgium
Search for other works by this author on:
T. Verstraete
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgiume-mail: verstraete@vki.ac.be
Z. Alsalihi
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgiume-mail: alsalihi@vki.ac.be
R. A. Van den Braembussche
von Kármán Institute for fluid Dynamics
, Waterloose steenweg, 72, 1640, Sint-Genesius-Rode, Belgiume-mail: vdb@vki.ac.be
J. Turbomach. Oct 2007, 129(4): 835-841 (7 pages)
Published Online: October 11, 2006
Article history
Received:
June 20, 2006
Revised:
October 11, 2006
Citation
Verstraete, T., Alsalihi, Z., and Van den Braembussche, R. A. (October 11, 2006). "Numerical Study of the Heat Transfer in Micro Gas Turbines." ASME. J. Turbomach. October 2007; 129(4): 835–841. https://doi.org/10.1115/1.2720874
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