Report on the Testing of a Hybrid (Radial-to-Axial) Compressor.
Final rept. to Jul 73,
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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A full account is given of a test program to evaluate a prototype hybrid compressor, wherein the flow is turned through 180 degrees from axial to radial to axial within the rotor. The initial stator, or diffuser, consisted of two cascades of unswept and untwisted blades arranged and designed as in an axial compressor. The performance was measured with two diffusers of different solidities and with changes in the blade stagger angles. The maximum efficiency approached 80 however, the flow was separated in the second blade row for all diffuser designs tested. Surveys from hub to tip at the rotor exit revealed an unusually large variation in flow angle. Approximations were obtained from normalized distributions of velocity and angle from all tests which will allow the design of a diffuser with swept or twisted blades. Modified author abstract
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