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Sudden Area Enlargement Pressure Recovery with Inflow Distortion

Published online by Cambridge University Press:  04 July 2016

R. A. Tyler  and
R. G. Williamson
R. A. Tyler
Affiliation:
National Research Council of Canada
R. G. Williamson
Affiliation:
National Research Council of Canada
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Extract

Pressure recovery measurements in a straight pipe with crossflow-generated entry velocity distributions suggested substantial effects of inflow distortion on the pressure recovery downstream of a sudden enlargement in area. This note reports results of actual measurements in the same pipe equipped with entry sections of various reduced diameters providing sudden area enlargement ratios of 1.33, 1.71, 2.04, and 3.52. The results have practical bearing on the performance of settling pipes located at diffuser exits where, in general, velocity distributions are significantly non-uniform. In addition, the results provide information on the momentum content of the crossflow-generated velocity distribution.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 72 , Issue 687 , March 1968 , pp. 243 - 244
Copyright
Copyright © Royal Aeronautical Society 1968 

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References

1. Tyler, R. A. and Williamson, R. G. Diffuser Performance with Distorted In flow. Symposium on Subsonic Fluid Flow Losses in Complex Passages and Ducts. Institution of Mechanical Engineers, 4th October 1967.Google Scholar
2. Sprenger, H. Experimentelle Unter-suchungen an Geraden und Gerkrummten Diffusoren. Mitteilungen aus dem Institut fur Aerodynamic, Zurich, No. 27, 1959. (MoA Translation, TIL/T5134, 1962.)Google Scholar