Experimental Study of Tip Clearance Losses and Noise in Axial Turbomachines and Their Reduction

[+] Author and Article Information
F. Kameier

BMW Rolls-Royce Aeroengines, Eschenweg, 15827 Dahlewitz, Federal Republic of Germany

W. Neise

Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V., Abteilung Turbulenzforschung Berlin Müller-Breslau-Straße 8, 10623 Berlin, Federal Republic of Germany

J. Turbomach 119(3), 460-471 (Jul 01, 1997) (12 pages) doi:10.1115/1.2841145 History: Received February 17, 1995; Online January 29, 2008


An experimental study is described to investigate the negative effects of the tip clearance gap on the aerodynamic and acoustic performance of axial turbomachines. In addition to the increased broadband levels reported in the literature when the tip clearance is enlarged, significant level increases were observed within narrow frequency bands below the blade passing frequency. Measurements of the pressure and velocity fluctuations in the vicinity of the blade tips reveal that the tip clearance noise is associated with a rotating flow instability at the blade tip, which in turn is only present under reversed flow conditions in the tip clearance gap. A turbulence generator inserted into the tip clearance gap is found to be effective in eliminating the tip clearance noise and in improving the aerodynamic performance.

Copyright © 1997 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





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 Journal Articles
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