Accession Number : ADA259334
Title : A Comparison of Predicted and Measured Inlet Distortion Flows in a Subsonic Axial Inlet Flow Compressor Rotor
Descriptive Note : Technical memo.
Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC
Personal Author(s) : Owen, Albert K
Report Date : Mar 1992
Pagination or Media Count : 198
Abstract : Detailed flow measurements were taken inside an isolated axial compressor rotor operating subsonically near peak efficiency. These 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 detailed comparison in the rotor relative reference frame between a Navier-Stokes solver and the measured experimental results showed good agreement between the predicted and measured flows. 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 and the computed predictions is made to assess the development of a passage vortex due to the distortion of the inlet flow. Computed predictions indicate that a distorted inlet profile has a minimal effect on the development of the flow in the rotor passage and the resulting passage vortex.... Laser anemometer, Inlet distortion, Secondary flows.
Descriptors : *COMPRESSOR ROTORS , *AXIAL FLOW COMPRESSORS , MEASUREMENT , PREDICTIONS , COMPARISON , EFFICIENCY , LASERS , PROFILES , AXISYMMETRIC , FLOW , FRAMES , SECONDARY FLOW , LASER ANEMOMETERS , AGREEMENTS , HUBS , COMPRESSORS , ROTORS , DISTORTION , INLETS , ANEMOMETERS
Subject Categories : Hydraulic and Pneumatic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE