Prediction of Acoustic, Vorticity and Entropy Waves Generated by Short-Duration Acoustic Pulses Incident on a Blade Row PUBLIC ACCESS

[+] Author Affiliations
Miklos Sajben

University of Cincinnati, Cincinnati, OH

Paper No. 99-GT-148, pp. V004T03A011; 12 pages
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7861-3
  • Copyright © 1999 by ASME


Some long-standing questions concerning the dynamic behavior of coupled inlet/compressor systems have been answered by analyzing data from recent experiments in which the reflections of intense, short-duration acoustic pulses from an operating compressor were documented. The present paper offers a simple, one-dimensional integral theory as a background for these experiments. The arrival of an acoustic pulse (or an acoustic step change) to a single row of stationary blades gives rise to two acoustic waves (one upstream and one downstream), one vorticity wave, and possibly also an entropy wave. Pulses are characterized by integrals of spatial distributions of pressure, temperature or tangential velocity, while steps are defined by the jump of these flow properties at the wave. Simple expressions are given for the strength of each wave type, in terms of the blade stagger angle and the axial Mach number. The results help in interpreting, scaling and extrapolating experimental data. The work is a step towards an ability to specify realistic outflow boundary conditions in unsteady inlet flow computations, as appropriate for the compressor geometry and the operating conditions.

Copyright © 1999 by ASME
This article is only available in the PDF format.



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