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Evaluation of panel code predictions with experimental results of inlet performance for a 17-inch ducted prop/fab simulator operating at Mach 0.2An axisymmetric panel code was used to evaluate a series of ducted propeller inlets. The inlets were tested in the Lewis 9 by 15 Foot Low Speed Wind Tunnel. Three basic inlets having ratios of shroud length to propeller diameter of 0.2, 0.4, and 0.5 were tested with the Pratt and Whitney ducted prop/fan simulator. A fourth hybrid inlet consisting of the shroud from the shortest basic inlet coupled with the spinner from the largest basic inlet was also tested. This later configuration represented the shortest overall inlet. The simulator duct diameter at the propeller face was 17.25 inches. The short and long spinners provided hub-to-tip ratios of 0.44 at the propeller face. The four inlets were tested at a nominal free stream Mach number of 0.2 and at angles of attack from 0 degrees to 35 degrees. The panel code method incorporated a simple two-part separation model which yielded conservative estimates of inlet separation.
Document ID
19910015792
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Boldman, D. R. (NASA Lewis Research Center Cleveland, OH., United States)
Iek, C. (NASA Lewis Research Center Cleveland, OH., United States)
Hwang, D. P. (NASA Lewis Research Center Cleveland, OH., United States)
Jeracki, R. J. (NASA Lewis Research Center Cleveland, OH., United States)
Larkin, M. (Pratt and Whitney Aircraft East Hartford, CT., United States)
Sorin, G. (Pratt and Whitney Aircraft East Hartford, CT., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:104428
AIAA PAPER 91-3354
E-6261
NASA-TM-104428
Meeting Information
Meeting: Joint Propulsion Conference
Location: Sacramento, CA
Country: United States
Start Date: June 24, 1991
End Date: June 27, 1991
Sponsors: American Society for Electrical Engineers, ASME, AIAA, SAE
Accession Number
91N25106
Funding Number(s)
PROJECT: RTOP 535-03-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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