Conical diffusers with inflow distortion: Estimated peak local velocity at exit

Title

Conical diffusers with inflow distortion: Estimated peak local velocity at exit

 Author

Tyler, R.A.
Williamson, R.G.

Institution

National Research Council Canada, Division of Mechanical Engineering

 Date

1973-09-30

 Abstract

A simple analytical expression relating exit and entry distortion factor. VMAX/VMEAN' for a conical-type diffuser is derived. The expression involves two assigned constants, values for which are obtained from a quantitative fit of measured data for a series of six conical diffuser configurations. operated with cross-flow generated inflow distortion at entry distortion factors up to about 3,O. Corresponding expressions for momentum coefficient and static pressure recovery coefficient are presented and shown to reproduce observed trends. The correlation is used to indicate a lower bound to the peak local velocity at exit from a practical gas turbine exhaust system consisting of an unassisted diffusing elbow followed by a straight conical-type diffuser.

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 Publisher

National Research Council Canada

 Access restriction

Campus only

 Source

National Research Council Aeronautical Report LR 570, NRC 13716

 Part of collection

Aerospace Engineering Reports

 Document type

report

 Rights

(c) 1973 National Research Council Canada
Files
PDF LR-570.pdf 5.28 MB
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