Effects of Inlet Distortion on the Development of Secondary Flows in a Subsonic Axial Inlet Compressor Rotor

Detailed flow measurements were taken inside an isolated axial compressor rotor operating subsonically near peak efficiency. Laser Anemometer measurements were made with two inlet velocity profiles. One profile consisted of an unmodified baseline flow, and the second profile was distorted by placing...

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Bibliographic Details
Main Author: Owen, Albert K
Format: Report
Language:English
Subjects:
ASH45
AXIAL COMPRESSOR
AXIAL FLOW COMPRESSORS
BASE LINES
COMPARISON
COMPRESSOR ROTORS
COMPUTATIONS
COVERINGS
DISTORTION
EFFICIENCY
FLOW
Hydraulic and Pneumatic Equipment
INLET DISTORTION
INLETS
LASER ANEMOMETER
LASER ANEMOMETERS
MATHEMATICAL PREDICTION
MEASUREMENT
PE61102A
PEAK VALUES
PROFILES
SECONDARY FLOW
SECONDARY FLOWS
VELOCITY
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Summary:Detailed flow measurements were taken inside an isolated axial compressor rotor operating subsonically near peak efficiency. Laser Anemometer measurements were made with two inlet velocity profiles. One profile consisted of an unmodified baseline flow, and the second profile was distorted by placing axisymmetric screens on the hub and shroud well upstream of the rotor. A primary flow is defined in the rotor and deviations from this primary flow for each inlet flow condition are identified. A comparison between the two flow deviations is made to assess the development of a passage vortex due to the distortion of the inlet flow. A comparison of experimental results with computational predictions from a Navier-Stokes solver showed good agreement between predicted and measured flows. Measured results indicate that a distorted inlet profile has minimal effect on the development of the flow i the rotor passage and the resulting passage vortex. Doctoral thesis. Original contains color plates: All DTIC/ NTIS reproductions will be in black and white.