The Performance Estimation of Transonic Turbine at Design and Off-Design Conditions PUBLIC ACCESS

[+] Author Affiliations
Ge Manchu

Chinese Academy of Sciences, Beijing, China

Paper No. 87-GT-148, pp. V001T01A043; 6 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 1: Turbomachinery
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7923-8
  • Copyright © 1987 by ASME


A performance estimation method has been developed for the transonic turbine. This method can be used for the calculation of gasdynamic parameters of turbines at design and off-design conditions. In this paper a group of simultaneous equations including the S2 stream surface equation, the simplified flow correlation between blade and blade, the loss equations and the deviation angle correlation are solved (Wu, 1950, 1950, 1965; Marsh, 1966; Smith 1973; Novak and Hearsey, 1977.) Solving these equations, the turbine performance can be obtained.

The essential difference in treating the sub-critical, critial and super-critical flow conditions is researched. The correlation between entropy and losses is deduced in this paper. For the choking flow calculation, a unified approach to solve these equations is developed. On the basis of the above research, the false choking condition will not occur and convergence will be reached rapidly with this method.

A computer program was then compiled with this method and has been used for the performance calculation of transonic turbines at design and off-design conditions.

Several examples have been calculated. Satisfactory results are obtained and the reduced flow rate, efficiency and expansion ratio are fairly consistent with the experimental results. The difference between the computational results and experimental data is within 1% near the design condition.

Copyright © 1987 by ASME
Topics: Design , Turbines
This article is only available in the PDF format.



Interactive Graphics


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

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