Accession Number : ADA257269


Title :   An Investigation of Unsteady Impeller-Diffuser Interactions in a Centrifugal Compressor


Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF MECHANICAL ENGINEERING


Personal Author(s) : Bryan, William B ; Fleeter, Sanford


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257269.pdf


Report Date : Aug 1992


Pagination or Media Count : 190


Abstract : An investigation of steady and unsteady flow phenomena in centrifugal compressors has been performed. The effect of vaned diffuser geometry on the compressor unsteady aerodynamics has been considered, with particular emphasis on the diffuser vane unsteady loading generated by the impeller circumferentially nonuniform flow field. A series of experiments was performed in the Purdue Research Centrifugal Compressor Facility to quantify the compressor performance, impeller blade and diffuser vane steady surface static pressure, vaneless diffuser steady and unsteady velocity field, diffuser vane unsteady surface static pressure, as well as surge and rotating stall occurrence. These measurements were made for various flow rates, number of diffuser vanes, diffuser vane leading edge-impeller exit radius ratios, diffuser vane stagger angles, and nonuniform circumferential vane spacing. Centrifugal Compressor, Unsteady Aerodynamics, Vaneless Diffuser, Laser Anemometry, Vaned Diffuser.


Descriptors :   *FLOW FIELDS , *CENTRIFUGAL COMPRESSORS , VELOCITY , FLOW RATE , PRESSURE , LEADING EDGES , DIFFUSERS , IMPELLERS , UNSTEADY FLOW , STATIC PRESSURE , AERODYNAMICS , LASER ANEMOMETERS , NONUNIFORM FLOW


Subject Categories : Hydraulic and Pneumatic Equipment
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE