Wake–Wake Interaction and Its Potential for Clocking in a Transonic High-Pressure Turbine

[+] Author and Article Information
Frank Hummel

Institute of Propulsion Technology, German Aerospace Center (DLR), Göttingen, Germany

J. Turbomach 124(1), 69-76 (Feb 01, 2001) (8 pages) doi:10.1115/1.1415036 History: Received February 01, 2001
Copyright © 2002 by ASME
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Stage configuration at midspan (axial gap 0.38 cax,s) with trigger position indicated
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Computational grid, entire domain, and details of vane and blade trailing edges
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Comparison of the time-averaged rotor blade isentropic surface Mach numbers from computation with values from the L2F measurements (obtained by extrapolating to the blade surface)
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Measured and calculated pressure fluctuations at the rotor blade surfaces (gap 0.49cax,s; SS=suction side, PS=pressure side)
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Calculated frequency spectra of pressure fluctuations at the rotor blade surfaces (SS=suction side, PS=pressure side)
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Total temperature and vorticity distribution behind the stator, absolute frame of reference
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Vorticity distribution behind the rotor, relative frame of reference
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Total temperature distribution behind the rotor, relative frame of reference
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Space–time diagram of normalized static pressure and eddy viscosity at Δx/cax,s=0.4 behind the rotor trailing edge
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Schematic of wake–wake interaction behind the rotor, relative frame of reference
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Comparison of rotor wake decay for steady and time-averaged unsteady simulation at two axial positions behind the rotor trailing edge (U=u2+v2, in relative frame of reference)
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Clocking potential for reduction of shock strength behind the rotor
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Static pressure field at an instant in time, showing the unsteadiness of the rotor trailing edge shocks




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