Fluctuating pressures on wing surfaces in the slipstream of a single-rotor propfanMeasurements of the fluctuating pressure levels (FPLs) induced on a Propfan Test Assessment wing by the SR-7L propfan slipstream within the airplane flight envelope were obtained as a function of propfan operating conditions. It is shown that FPLS were high over most of the flight envelope, and that the spectra were dominated by the propfan first-order blade passage frequency tone. The highest FPLs were found at the lowest aircraft test altitudes and Mach numbers and for propfan conditions of lowest rotational tip speed and highest power.
Document ID
19890048847
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Swift, G. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)
Bartel, H. W. (Lockheed Aeronautical Systems Co. Marietta, GA, United States)