0

Full Content is available to subscribers

Subscribe/Learn More  >

Design and Analysis of a High Stage Loading Five-Stage LP Turbine Rig Employing Improved Transition Modeling

[+] Author Affiliations
Jochen Gier, Norbert Hübner

MTU Aero Engines GmbH, Munich, Germany

Paper No. GT2005-68971, pp. 759-769; 11 pages
doi:10.1115/GT2005-68971
From:
  • ASME Turbo Expo 2005: Power for Land, Sea, and Air
  • Volume 6: Turbo Expo 2005, Parts A and B
  • Reno, Nevada, USA, June 6–9, 2005
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4730-6 | eISBN: 0-7918-3754-8
  • Copyright © 2005 by ASME

abstract

Modern aircraft engine designs have to realize high performance while managing important weight and cost issues. For high bypass ratio engines this results in high demands for the low pressure turbine component. The combination of a low speed parameter due to large fan diameters with reduced number of turbine stages due to weight and cost considerations leads to high stage loading requirements. Realizing high turbine efficiencies at low Reynolds Number operation at high altitudes for these high stage loadings is a key for state-of-the-art turbofan engines. For the aerodynamic design, high stage loading factors directly translate into increased airfoil flow turning. These increased turning levels have to be realized in combination with elevated airfoil load in order to keep low airfoil counts. This is particularly challenging in combination and requires minimization of negative effects on the airfoil losses and secondary losses. In this paper the development of a five-stage turbine with high stage loading is discussed with focus on the aerodynamic design. A specially designed cascade test has been part of the turbine design, which showed the need for improvement of the transition modeling within the CFD code used for design and analysis. The derived modeling enhancement is then employed for the analysis of the five-stage rig, which was tested at the altitude test facility at Stuttgart University. The modeling achieved significant improvements in the quality of the numerical results. The analysis includes sensitivities to Reynolds number and a detailed view of the suction side flow.

Copyright © 2005 by ASME
Topics: Design , Modeling , Turbines

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