Full Content is available to subscribers

Subscribe/Learn More  >

A Low Order Model for Predicting Turbocharger Turbine Unsteady Performance

[+] Author Affiliations
Teng Cao, Liping Xu

University of Cambridge, Cambridge, UK

Paper No. GT2014-25913, pp. V02DT42A022; 14 pages
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 2D: Turbomachinery
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4563-9
  • Copyright © 2014 by ASME


In this paper, a low order model for predicting performance of radial turbocharger turbines is presented. The model combines an unsteady quasi-three dimensional CFD method with multiple one-dimensional meanline impeller solvers. The new model preserves the critical volute geometry features, which is crucial for the accurate prediction of the wave dynamics and retains effects of the rotor inlet circumferential non-uniformity. It also still maintains the desirable properties of being easy to set up and fast to run.

The model has been validated against a experimentally validated full three-dimensional URANS solver. The loss model in the meanline model is calibrated by the full 3D RANS solver under the steady flow states. The unsteady turbine performance under different inlet pulsating flow conditions predicted by the model was compared with the results of the full 3D URANS solver. Good agreement between the two was obtained with a speed up ratio of about four orders of magnitude (∼104) for the low order model.

The low order model was then used to investigate the effect of different pulse wave amplitudes and frequencies on the turbine cycle averaged performance. For the cases tested, it was found that compared with quasi-steady performance, the unsteady effect of the pulsating flow has a relatively small impact on the cycle averaged turbine power output and the cycle averaged mass flow capacity while it has a large influence on the cycle averaged ideal power output and cycle averaged efficiency. This is related to the wave dynamics inside the volute and the detailed mechanisms responsible are discussed in this paper.

Copyright © 2014 by ASME



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