0

Full Content is available to subscribers

Subscribe/Learn More  >

Investigation of Separating and Utilizing the Influences of Up- and Downstream Blade Rows

[+] Author Affiliations
Ben Zhao, Ce Yang, Du Li

Beijing Institute of Technology, Beijing, China

Liangjun Hu

Chinese Academy of Sciences, Beijing, China

Mi Zhou

Bohai Shipbuilding Vocational College, Huludao, China

Paper No. GT2012-68371, pp. 2467-2481; 15 pages
doi:10.1115/GT2012-68371
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 8: Turbomachinery, Parts A, B, and C
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4474-8
  • Copyright © 2012 by ASME

abstract

The superimposed influences of the blade rows in multistage compressor are important, because different matching status of upstream and downstream blades can result in significant differences in unsteady pressure fluctuations. Numerical investigation of the unsteady pressure distributions on axial stator blade, which affect by the axial rotor in the upstream and the radial rotor in the downstream, was performed in an axial-radial combined compressor. Unsteady pressure fluctuation was investigated. When rotors have equal blade numbers, the unsteady pressure fluctuates periodically versus time within T time. On contrast, it fluctuates irregularly within T time when they have different blade numbers. A model-split subtraction method to separate the influences of the individual blade rows on the profile pressure distribution of the axial stator was presented. Analysis from the rotor-stator configuration showed that the unsteady pressure fluctuation response caused by the upstream rotor. For the rotor-stator-rotor configuration, the unsteady pressure fluctuations were influenced by up- and downstream blade rows. With the model-split subtraction method, the up- and downstream influences on the unsteady pressure could be clearly separated and quantified. High amplitudes were observed when the influences from up- and downstream moving rows were superimposed with “positive peak-positive peak” type wave. In contrast, the amplitudes were decreased by the opposite superimposition phase (“positive peak-negative peak” type wave). Clocking investigations were carried out for two goals. One is to show the isolated influence from up- or downstream rotor by eliminating down- or upstream influence components. This is called clocking subtraction method. The other one is to change the relative superimposed phase of influences from the surrounding blade rows. Thus, the physical mechanism of the unsteady pressure fluctuation amplitude modulation by means of clocking was put forward.

Copyright © 2012 by ASME
Topics: Blades

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