0

Full Content is available to subscribers

Subscribe/Learn More  >

Modeling Laminar-to-Turbulent Transition in a Low-Pressure Turbine Flow Which Is Unsteady Due to Passing Wakes: Part I — Transition Onset

[+] Author Affiliations
Nan Jiang, Terrence W. Simon

University of Minnesota, Minneapolis, MN

Paper No. GT2003-38787, pp. 861-870; 10 pages
doi:10.1115/GT2003-38787
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 5: Turbo Expo 2003, Parts A and B
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3688-6 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

The open literature on modeling transition to turbulence of boundary layer flows in low-pressure turbines is reviewed. Included are the separated flow transition onset models of Mayle and of Davis et al. and the attached flow transition onset models of Mayle, Abu-Ghannam and Shaw and Drela. Their results are applied against data previously taken at the University of Minnesota (UMN) to assess their performance for use on the suction surface of a turbine blade in the presence of passing wakes. The data show measurements of velocity, turbulence level, intermittency and spatial and temporal acceleration resolved in space and phase angle within the wake passing period. In a “quasi-static” comparison, the input values to the models are values taken from the experiment, resolved in phase angle within the wake-passing period. Predictions from the models (the flow states with regard to transition throughout the wake-passing period) are compared with instantaneous intermittency values taken from the experiment. The Mayle separated and attached flow onset models are shown to be successful for the case investigated when applied in that fashion. The Abu-Ghannam and Shaw and Drela transition onset models predict onset locations which are somewhat downstream of where the data indicate the transition onset to be. Unique characteristics regarding transition observed at different times in a wake passing cycle are discussed. Some reasons are given to explain the differences between experimental results and model predictions. Transition onset modeling is addressed in the present paper and transition path modeling is addressed in a companion paper (part II).

Copyright © 2003 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In