THEORETICAL INVESTIGATION OF DUCTED PROPELLER AERODYNAMICS, VOLUME 3
REPUBLIC AVIATION CORP FARMINGDALE NY
Pagination or Media Count:
Problems of the ducted fan and its application in VTOL aircraft are investigated. General considerations are presented for the design of vertical take-off aircraft. The ideal loading of single rotation propellers in a circular duct is examined. The flow field was derived for a non-uniform sink distribution in a circular disk and for a cylindrical non-uniform vortex sheet. The velocity field and forces on a flat plate due to a cylindrical jet with an elliptical cross-section were also derived. Experimental data are given in tabular and graphic form on the interference effect of a jet on the VTOL aircraft. Design requirements of deflection vanes are discussed with the results of an experimental investigation on a cascade of circular arc sections.