Numerical Unsteady Flow Analysis of a Turbine Stage With Extremely Large Blade Loads

[+] Author and Article Information
Markus Jöcker, Francois X. Hillion, Torsten H. Fransson

Royal Institute of Technology, Chair of Heat and Power Technology, S-10044 Stockholm, Sweden

Ulf Wåhlén

Volvo Aero Corporation, Space Propulsion Division, S-46181 Trollhättan, Sweden

J. Turbomach 124(3), 429-438 (Jul 10, 2002) (10 pages) doi:10.1115/1.1458023 History: Received October 13, 2000; Online July 10, 2002
Copyright © 2002 by ASME
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Description of investigated turbine stage configurations
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Steady rotor surface pressure, VOLSOL and UNSFLO results, gax=29 percent
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Unsteady rotor surface pressure, Volsol 2-D—Unsflo 2-D, gax=29 percent
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Harmonics 1–4 of rotor surface perturbation pressure, UNSFLO, nominal case
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Perturbation pressure and velocity flow field at four instants in time, UNSFLO, nominal case
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Time space plot of rotor surface perturbation pressure p/pt1, UNSFLO, nominal case
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Blade forces and moment in percent of time average, UNSFLO, nominal case
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Vortical and potential influence on 1st harmonic rotor surface perturbation pressure, UNSFLO
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Unsteady forces normalized with time average in the complex plane, UNSFLO
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Evolution with axial gap of the stator row and rotor row contributions to the pressure distribution at their interface
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Instantaneous aerodynamic force on the rotor blade for all the gaps
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Amplitude of the time harmonics of the aerodynamic force for all the gaps
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Perturbation pressure field at gax=8 percent, at times 0.2 and 0.3
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Time space plot of the rotor surface perturbation pressure at gax=8 percent
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1st harmonic of Rotor surface perturbation pressure, UNSFLO, vane study
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Time space plots of blade surface perturbation pressure, scaled cases
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Comparison of present results to studies found in literature




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