Accession Number : AD0718377

Title :   Balance Measured Thrust Performance of Various Cowled Axial Fan Configurations in a Mainstream at 90 deg Incidence.

Descriptive Note : Aeronautical rept.,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF MECHANICAL ENGINEERING

Personal Author(s) : Tyler,R. A. ; Williamson,R. G.

Report Date : OCT 1970

Pagination or Media Count : 158

Abstract : Balance measured force data are presented for a series of thrusting fan configurations (tip dia. 15 in) operated in cross-flow, at 90 deg incidence, in the 10 ft. x 20 ft. N.R.C. V/STOL Propulsion Tunnel. Test conditions involved tunnel speeds from 30 to 130 ft/sec. in combination with mean intake velocities from 100 to 400 ft./sec. The force data provide a direct measure of fan gross thrust performance at constant fan speed, under conditions of increasing forward speed, i.e. increasing inflow distortion. Limited pressure data afford an indication of the behaviour of overall fan pressure ratio under the same conditions. A total of 51 different configurations was tested, providing some insight into the effects of various configurational variables on thrust performance sensitivity to crossflow conditions. (Author)

Descriptors :   (*DUCTED FANS, *THRUST), EXHAUST NOZZLES, AERODYNAMIC CONFIGURATIONS, DESIGN, EXPERIMENTAL DATA, VERTICAL TAKEOFF AIRCRAFT, CANADA

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE