0

Full Content is available to subscribers

Subscribe/Learn More  >

Forcing Superposition and Decomposition of an Embedded Compressor Rotor

[+] Author Affiliations
Jing Li, Robert Kielb

Duke University, Durham, NC

Paper No. GT2017-64657, pp. V07BT36A024; 11 pages
doi:10.1115/GT2017-64657
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 7B: Structures and Dynamics
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5093-0
  • Copyright © 2017 by ASME

abstract

This paper investigates superposition and decomposition methods when determining the forcing function on an embedded rotor in a multistage axial compressor. Under investigation is a 3-row stator/rotor/stator configuration where two stators, having the same vane count, can be circumferentially clocked to change the rotor excitation. The combined forcing function on the rotor in any arbitrary clocking arrangement is assumed to be a linear combination of two known clocking positions. In this study, the forcing function from these known positions are first approximated by two 2-row CFD solutions, namely stator/rotor and rotor/stator. It is found that theses approximations are poor, since they do not include the significant effect of stator-stator interaction. Next, these two forcing components are obtained via a linear decomposition using two 3-row CFD solutions at two clocking positions. A linear superposition is performed based on these decomposed results to estimate the combined rotor forcing for any arbitrary clocking position. It is found that although the trend of rotor forcing with respect to clocking is qualitatively captured, considerable quantitative discrepancies exist that refute the proposed linearity assumption. This assumption oversimplifies the multi-row aerodynamic interactions: a change in the stator-stator clocking position does not only alter the relative phase between two stator-induced forcing functions to the rotor, but also these two components themselves.

Copyright © 2017 by ASME
Topics: Compressors , Rotors

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