Experimental investigation of a conservatively designed turbine at four rotor-blade solidities

Heller, Jack A., Whitney, Rose L., Cavicchi, Richard H.
naca-rm-e52c17
1952


The over-all performance of a conservatively designed turbine suitable for the last stage of a multi-stage turbine is presented. The turbine was investigated at four rotor blade solidities ranging from 0.85 to 2.27. The 44-blade-rotor turbine, having a solidity of 1.56, yielded the best efficiency over most of the range of investigation. The value of maximum brake internal efficiency was 0.895. The efficiency at the design point was 0.89. A relatively flat curve of maximum brake internal efficiency was found over most of the range of solidities investigated.

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