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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Paroubek, Jan Cyrus, Václav Kynčl, Jiři |
| Copyright Year | 1996 |
| Abstract | An aerodynamic investigation of the influence of outlet stator part (vaneless diffuser and return channel) surface roughness on aerodynamic performance of a very low flow coefficient centrifugal stage has been carried out. The stage with design inlet flow coefficient 0.007 was tested within the range of stage Mach number Mu2=0.5–1.1. Then the surface quality of outlet stator part was improved and the tests have been repeated. Aerodynamic performance and losses in both vaneless diffuser and return channel with de-swirl vanes were investigated. The values of isentropic head coefficient increased while those of loss coefficient decreased nearly in the whole range of characteristics in the stage with improved surface quality. The detailed pressure recovery in vaneless diffuser in vicinity of design point measured and calculated by the performance prediction method is compared and discussed. The nonsteady flow phenomena were also investigated. The change of dynamic stability limit by improving of surface quality was observed. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791878729 |
| DOI | 10.1115/96-GT-179 |
| Volume Number | Volume 1: Turbomachinery |
| Conference Proceedings | ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition |
| Language | English |
| Publisher Date | 1996-06-10 |
| Publisher Place | Birmingham, UK |
| Access Restriction | Open |
| Subject Keyword | Vaneless diffusers Design Dynamic stability Stators Compressors Surface roughness Surface quality Flow (dynamics) Pressure Mach number |
| Content Type | Text |
| Resource Type | Article |
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