Full Content is available to subscribers

Subscribe/Learn More  >

Numerical Study of Flow Control in a Diffuser by Vibration Wall and Mechanism Analysis by Establishment of a Nonlinear Simplified Model

[+] Author Affiliations
Lu Weiyu, Huang Guoping, Fu Xin, Wang Jinchun, Hong Shuli

Nanjing University of Aeronautics and Astronautics, Nanjing, China

Paper No. GT2017-63786, pp. V02DT46A014; 11 pages
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 2D: Turbomachinery
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5081-7
  • Copyright © 2017 by ASME


Vibration wall is a kind of important active flow control method, while the interaction between the vibration wall and unsteady separation flow is so complex for researchers to discover the corresponding mechanism. Current researches imply that the better controlled flow is the more ordered flow. At first, the effect of the different control parameters of vibration wall on the total pressure loss was studied by numerical simulation to reveal the control mechanism of vibration wall. Numerical results show that when the vibration frequency reaches the separation vortex frequency, with the amplitude of 0.1 characteristic length, the best flow control is resulted. Furthermore, it can be seen that, the vibration wall with effective parameters can make the large-scale vortices more dominant, while small-scales ones (or clutters) appear less in the pattern. This observation indicates that the flow field tends to be more orderly. Moreover, to further explain this ordering mechanism, a simplified model is established and analyzed, showing that valid external excitement can strengthen the dominated frequency of K-H wave which forms the large-scale separation vortices, and restrains small-scale ones. The flow field is then more orderly and less chaotic, resulting in reduction of flow loss.

Copyright © 2017 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