Accession Number:

ADA175141

Title:

Controlled Diffusion Compressor Blade Wake Measurements.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1986-09-01

Pagination or Media Count:

139.0

Abstract:

A controlled-diffusion compressor stator blade-element design was re-tested in a subsonic cascade wind tunnel to obtain data with which to assess viscous computational prediction methods. Tests were conducted near design and toward stall conditions at Mach 0.28 and Reynolds number of 774000. Loss coefficient, diffusion factor and AVDR Axial Velocity Density Ratio were determined by mass averaging pneumatic pressure probe survey measurements. Wake velocity profiles were measured from 0.12 to 1.77 chordlengths downstream. Concentration was placed on the verifications of accuracy by careful calibration, multiplicity and exchange of survey probes. Cylindrical probes were found not to measure wake yaw angles as accurately as conical probes. Experimental results showed that losses were dependent on Reynolds number and that all blade-element performances were independent of the down stream axial location at which they were determined. Keywords Controlled diffusion Compressor blade Wake measurements Velocity profiles. Theses.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE