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Comparison of Numerical Methods for the Prediction of Time-Averaged Flow Quantities in a Cooled Multistage Turbine

[+] Author Affiliations
Ritu P. Marpu

CD-adapco, Orlando, FL

Chad H. Custer

CD-adapco, Northville, MI

Venkataramanan Subramanian

CD-adapco, Bangalore, Karnataka, India

Jonathan M. Weiss

CD-adapco, Lebanon, NH

Kenneth C. Hall

Duke University, Durham, NC

Paper No. GT2015-43717, pp. V02CT44A028; 11 pages
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 2C: Turbomachinery
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5665-9
  • Copyright © 2015 by ASME


An unsteady simulation of a two-stage, cooled, high pressure turbine cascade is achieved by applying the harmonic balance method, a mixed time domain and frequency domain computational fluid dynamic technique for efficiently solving periodic unsteady flows. A comparison of computed temperature and pressure profile predictions generated using the harmonic balance method and a conventional steady mixing plane analysis is presented. The predicted temperature and pressure profiles are also compared to experimental data at the stage exit plane. The harmonic balance solver is able to efficiently model unsteady flows caused by wake interaction and secondary flow effects due to cooling flows. It is demonstrated that modeling the unsteady effects is critical to the accurate prediction of time-averaged flow field quantities, particularly for cooled machines.

Copyright © 2015 by ASME



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