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Title: The influence of compressor outlet conditions on the performance of annular diffusers
Author: Harasgama, Sriwickrama P.
Awarding Body: Loughborough University of Technology
Current Institution: Loughborough University
Date of Award: 1981
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Experiments have been carried out on an Optimum (Cp*) Diffuser (Area Ratio - 2:1) to investigate the way in which compressor exit conditions influence the performance and boundary layer growth within the diffuser. Three sets of conditions simulated by 0°, 15° and 30° Radially Tilted O.G.V. (outlet guide vanes) have been studied. Compressor delivery conditions were simulated by a single Rotor row just upstream of the O.G.V. The Rotor/O.G.V. constituted a single compressor stage and was sited 0.125 blade chord lengths upstream of diffuser inlet. The diffuser static pressure recovery, total pressure loss and flow stability were, in all cases, better than that achieved with fully developed flow at inlet to the diffuser. The 30° O.G.V. configuration being the most superior.
Supervisor: Not available Sponsor: National Gas Turbine Establishment
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Fluid mechanics Fluid mechanics