Accession Number : AD0683792

Title :   ROTOR INDUCED FLOW FIELDS IN GROUND EFFECT IN THE VICINITY OF A VERTICAL STEP.

Descriptive Note : Scientific rept. for Jul-Dec 68,

Corporate Author : WEST VIRGINIA UNIV MORGANTOWN DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Migliore,Paul G.

Report Date : JAN 1969

Pagination or Media Count : 85

Abstract : It is the purpose of this analysis to devise a means of theoretically predicting the flow fields induced by hovering rotors in ground effect and influenced by the proximity of a vertical step. A two dimensional investigation is performed. Assuming a perfect fluid allows the problem to be solved using complex potential theory. Values of induced velocities and stream function are determined by considering the contributions of a finite number of discreet vortices and their images in the transformed plane. Results appear to be qualitatively accurate within the confines of the wake cylinder and in areas very close to the wake boundaries. (Author)

Descriptors :   (*HELICOPTER ROTORS, *HOVERING), (*GROUND EFFECT, HELICOPTER ROTORS), FLOW FIELDS, AERODYNAMIC CONFIGURATIONS, INCOMPRESSIBLE FLOW, VORTICES, HELICOPTERS, COMPUTER PROGRAMS, MATHEMATICAL PREDICTION

Subject Categories : Aerodynamics
      Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE