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Theory and tests of two-phase turbinesA theoretical model for two-phase turbines was developed. Apparatus was constructed for testing one- and two-stage turbines (using speed decrease from stage to stage). Turbines were tested with water and nitrogen mixtures and refrigerant 22. Nozzle efficiencies were 0.78 (measured) and 0.72 (theoretical) for water and nitrogen mixtures at a water/nitrogen mixture ratio of 68, by mass; and 0.89 (measured) and 0.84 (theoretical) for refrigerant 22 expanding from 0.02 quality to 0.28 quality. Blade efficiencies (shaft power before windage and bearing loss divided by nozzle jet power) were 0.63 (measured) and 0.71 (theoretical) for water and nitrogen mixtures and 0.62 (measured) and 0.63 (theoretical) for refrigerant 22 with a single stage turbine, and 0,70 (measured) and 0.85 (theoretical) for water and nitrogen mixtures with a two-stage turbine.
Document ID
19820014787
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Elliott, D. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 4, 2013
Publication Date
March 15, 1982
Subject Category
Energy Production And Conversion
Report/Patent Number
JPL-PUB-81-105
NASA-CR-168834
DOE/ER-10614/1
NAS 1.26:168834
Accession Number
82N22661
Funding Number(s)
CONTRACT_GRANT: DE-AI01-80ER-10614
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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