In-flight acoustic results from an advanced-design propeller at Mach numbers to 0.8Acoustic data for the advanced-design SR-3 propeller at Mach numbers to 0.8 and helical tip Mach numbers to 1.14 are presented. Several advanced-design propellers, previously tested in wind tunnels at the Lewis Research Center, are being tested in flight at the Dryden Flight Research Facility. The flight-test propellers are mounted on a pylon on the top of the fuselage of a JetStar airplane. Instrumentation provides near-field acoustic data for the SR-3. Acoustic data for the SR-3 propeller at Mach numbers up to 0.8, for propeller helical tip Mach numbers up to 1.14, and comparison of wind tunnel to flight data are included. Flowfield profiles measured in the area adjacent to the propeller are also included.
Document ID
19820051482
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mackall, K. G. (NASA Lewis Research Center Cleveland, OH, United States)
Lasagna, P. L. (NASA Lewis Research Center Cleveland, OH, United States)
Walsh, K. (NASA Ames Research Center Edwards, CA, United States)
Dittmar, J. H. (NASA Lewis Research Center Cleveland, OH, United States)