TECHNICAL PAPERS: Gas Turbines: Heat Transfer and Turbomachinery

Cooling Air Temperature Reduction in a Direct Transfer Preswirl System

[+] Author and Article Information
T. Geis, M. Dittmann, K. Dullenkopf

Lehrstuhl und Institut fur Thermische Strömungsmaschinen, University of Karlsruhe, 76128 Karlsruhe, Germany

J. Eng. Gas Turbines Power 126(4), 809-815 (Nov 24, 2004) (7 pages) doi:10.1115/1.1765124 History: Received October 01, 2002; Revised March 01, 2003; Online November 24, 2004
Copyright © 2004 by ASME
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Details of preswirl chamber, (dimensions in mm)
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Instrumentation of the receiver holes
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Detailed view of one total temperature probe
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Measured recovery factors for three cylindrical stagnation probes of equal shape
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Flow velocities inside the preswirl chamber
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Total temperatures (s=10 mm,c/d=0.04)
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Nondimensional temperature reduction (s=10 mm,c/d=0.04)
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Temperature elevation due to losses inside preswirl cavity and nozzle
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Comparison between measured and theoretical temperatures—effect of β̄eff and Mrotor
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Moment on rotor and corresponding temperature elevation



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