International Journal of Fluid Mechanics Research

ISSN for PRINT: 1064-2277

For Online Access

Best Paper Award Selection - Editorial Board Site

2003, Volume30

Issue 3

107 pages

DOI: 10.1615/InterJFluidMechRes.v30.i3

Issue price - $250.00

A. O. Borisyuk
Institute of Hydromechanics of the National Academy of Sciences of Ukraine, Zhelyabov Str., 8/4, 03680, Kyiv-180, MSP, Ukraine

Wall pressure fluctuations in a pipe, p_t, behind a stenotic narrowing are studied. Sharp increase of the pressure p_t in a finite region immediately downstream of the stenosis and the presence of a pronounced pressure maximum upstream of the point of re-attachment of the separated flow are found. Approximate estimates both for the distance from a stenosis to the point of maximum pressure and the pressure magnitude at this point are obtained. The study of the wall pressure power spectrum, P(ω), reveals low-frequency maxima in it. They are determined by the appropriate large-scale eddies in the regions of separated and re-attached flow, and their frequencies are close to the characteristic frequencies of the eddies' formation. These maxima are the main distinguishing features of the spectrum under investigation compared to the power spectrum of the wall pressure fluctuations in a fully-developed turbulent pipe flow.

DOI: 10.1615/InterJFluidMechRes.v30.i3.20 Download article, 15 pages

Article price - $35.00

<< Previous article   Next article >>