Abstract
The results of experimental studies on a centrifugal compressor stage using uncambered constant thickness low solidity diffuser vanes (LSD) are reported in this paper. In the present work, efforts are concentrated for study of stage performance with LSD vanes for a typical compressor stage at a tip mach number of 0.35. The effect of solidity and setting angle on overall stage performance is evaluated in terms of flow coefficient, head coefficient and efficiency. The results were normalised with the data available at design flow using vaneless diffuser. Improvement in performance as well as static pressure recovery was observed with LSD vanes of the chosen configuration as compared to vaneless diffuser configuration. Variation of blade loading is studied from the measurements of static pressure on pressure and suction surfaces of LSD vane.
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