Accession Number:

ADA339151

Title:

Tip Flows for Wings and Propellers and their Effect on the Predicted Performance

Descriptive Note:

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF CIVIL ENGINEERING

Personal Author(s):

Report Date:

1998-01-01

Pagination or Media Count:

44.0

Abstract:

Various wake alignment techniques which have been developed in the past for the analysis of noncavitating propellers in uniform inflows are reviewed and some of them are extended in the case of cavitating flows subject to inclined inflows. The effect of the inclined trailing wake geometry on the predicted cavities and blade forces is found to be significant. The effect of the tip vortex detachment location on the shape of the trailing wake and on the pressure distribution on the tip is studied for wings and propeller blades. The local viscous flow inside of the core of a tip vortex is formulated via a parabolic Navier-Stokes approach. Predicted open flow characteristics and unsteady forces acting on the blades of an inclined shaft propeller are compared to those predicted by other methods, as well as those measured in experiments.

Subject Categories:

  • Marine Engineering
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE