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Design and Experimental Performance of a Two Stage Partial Admission Turbine, Task B.1/B.4A three-inch mean diameter, two-stage turbine with partial admission in each stage was experimentally investigated over a range of admissions and angular orientations of admission arcs. Three configurations were tested in which first stage admission varied from 37.4 percent (10 of 29 passages open, 5 per side) to 6.9 percent (2 open, 1 per side). Corresponding second stage admissions were 45.2 percent (14 of 31 passages open, 7 per side) and 12.9 percent (4 open, 2 per side). Angular positions of the second stage admission arcs with respect to the first stage varied over a range of 70 degrees. Design and off-design efficiency and flow characteristics for the three configurations are presented. The results indicated that peak efficiency and the corresponding isentropic velocity ratio decreased as the arcs of admission were decreased. Both efficiency and flow characteristics were sensitive to the second stage nozzle orientation angles.
Document ID
19940022725
Document Type
Contractor Report (CR)
Authors
Sutton, R. F.
(Rockwell International Corp. Canoga Park, CA, United States)
Boynton, J. L.
(Rockwell International Corp. Canoga Park, CA, United States)
Akian, R. A.
(Rockwell International Corp. Canoga Park, CA, United States)
Shea, Dan
(Rockwell International Corp. Canoga Park, CA, United States)
Roschak, Edmund
(Rockwell International Corp. Canoga Park, CA, United States)
Rojas, Lou
(Rockwell International Corp. Canoga Park, CA, United States)
Orr, Linsey
(Rockwell International Corp. Canoga Park, CA, United States)
Davis, Linda
(Rockwell International Corp. Canoga Park, CA, United States)
King, Brad
(Rockwell International Corp. Canoga Park, CA, United States)
Bubel, Bill
(Rockwell International Corp. Canoga Park, CA, United States)
Date Acquired
September 6, 2013
Publication Date
December 14, 1992
Subject Category
Mechanical Engineering
Report/Patent Number
NAS 1.26:179548
NASA-CR-179548
AD-A277095
RI/RD92-214
E-8833
Funding Number(s)
CONTRACT_GRANT: NAS3-23773
Distribution Limits
Public
Copyright
Public Use Permitted.

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