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On a Numerical Method for the Simulation of Steady Jet Array Interaction With Rotating Components

[+] Author Affiliations
Valery Kostege, Sergey Chernyshev

Alstom Power, Moscow, Russia

Vladimir Vassiliev

Alstom Power, Baden, Switzerland

Paper No. GT2011-45832, pp. 1251-1260; 10 pages
doi:10.1115/GT2011-45832
From:
  • ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Vancouver, British Columbia, Canada, June 6–10, 2011
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5467-9
  • Copyright © 2011 by Alstom Technology, Ltd.

abstract

Experimental and theoretical investigations show that unsteady effects like moving wakes, tip vortices, passing shocks, pulsating injections and other similar structures significantly affect the aerodynamic characteristics of turbines and compressors. They also influence the thermal state and lifetime of components. Therefore it is very important for designers of turbomachines to properly simulate these effects. On the other hand, time-accurate computations are still expensive and require substantial resources in CPU and computer memory. Moreover the elapsed time is high. However in certain cases the numerical model for unsteady calculations can be simplified, allowing proper capture of the unsteadiness impact, but with much less required computing capacity. This makes the approach acceptable for design applications. Such a simplified method, applicable to a simulation of a steady jets array interaction with rotating components, is described in this paper. The advantages and limitations are discussed, and the validation results and application examples are presented.

Copyright © 2011 by Alstom Technology, Ltd.

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