Accession Number : AD0773194

Title :   Potential Flow Studies of Lift-Fan Inflow Interference Phenomena.

Descriptive Note : Final rept. 1 Feb 72-31 Jan 73,

Corporate Author : GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING

Personal Author(s) : Wu,J. C. ; Sigman,R. ; Hubbartt,J. ; McMahon,H.

Report Date : OCT 1973

Pagination or Media Count : 119

Abstract : The report presents results of a study of the lift-fan inlet problem and includes a comprehensive survey of the existing experimental data and analytical methods, an analysis of the potential flow, and a boundary layer analysis for lift-fan inlets. Numerical solutions are presented for potential flows associated with inlet ducts set in an infinite plane with and without a centerbody simulating the hub of the fan. The effects of the cross flow to mean inlet velocity ratio, of the inlet and hub lip radii to duct width ratio, of the inclination of the duct axis to the plane, and of the position of the hub relative to the plane on the flow in and near the inlet ducts are discussed utilizing a two dimensional potential flow analysis. (Modified author abstract)

Descriptors :   *Vertical takeoff aircraft, *Short takeoff aircraft, *Lift, *Ducted fans, Flow fields, Mathematical prediction, Hovering, Flight, Boundary layer, Transitions, Interference, Problem solving, Inlets, Numerical methods and procedures

Subject Categories : V/STOL
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE