Transonic Two-Dimensional Flow Analysis of Compressor Cascade with Splitter Vanes
Final technical rept. 2 Jan-30 Sep 1975
AIRESEARCH MFG CO OF ARIZONA PHOENIX
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A transonic relaxation program was utilized to analyze the inviscid flow through a cascade without splitters in order to verify the results of a previous experimental investigation. The analysis showed that viscous effects play a large part in the development of the flow field in the transonic flow regime. This was demonstrated by the following 1 inviscid flow is guided far better by the blades than the real flow, and 2 the blade surfaces are more highly loaded in the inviscid flow than in the experimentally observed viscous real flow. Following the analysis of inviscid flow through a cascade without the splitters, the program was modified to analyze the cascade flow with splitters. The results of the analysis indicated that 1 viscous effects were more pronounced with splitters present in the flow field, and 2 flow conditions incidence and flow split at the splitter leading edge were different from those observed experimentally. This made optimization of the splitter location through inviscid analysis a matter of questionable utility. A simplified scheme for deriving splitter passage flow areas to avoid choking was employed to develop two modified splitter configurations that were analyzed with use of the transonic relaxation program.
- Fluid Mechanics