Accession Number : ADA180744

Title :   Wake Roll Up of Trailing Vorticity.

Descriptive Note : Final rept. May 84-May 87,

Corporate Author : MISSISSIPPI UNIV UNIVERSITY DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Fox,John A.

Report Date : 15 MAY 1987

Pagination or Media Count : 24

Abstract : This research applies the Biot-Savart law to the trailing system of vortices from a propeller. A computer program was developed which considers the interaction of the shed vortices of the same sign, e.g. the tip bor the hub. The roll up of the vortex sheet appears to occur rather quickly but the geometry tends to change very slowly after one revolution of the sheet. While only one portion of the program to allow the incorporation of the entire shed system is described in appendix. It appears that the effects are significant only near the trailing edge and in the regions where the bound vorticity is rapidly changing. Keywords: Propeller hubs; Propeller blade tips; GHR(General Hydromechanics); Vortex shedding; Computer programs.

Descriptors :   *WAKE, *TRAILING VORTICES, *VORTEX SHEDDING, *AERIAL PROPELLERS, COMPUTER PROGRAMS, PROPELLERS, PROPELLER HUBS, TRAILING EDGES, VORTEX SHEDDING, SHEETS, VORTICES, ROLL, BLADES, HYDROMECHANICS

Subject Categories : Radiofrequency Wave Propagation
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE