Accession Number : AD0285293

Title :   A METHOD FOR THE DESIGN OF A SKEWED MARINE PROPELLER BASED ON WEISSINGER'S L-METHOD

Descriptive Note : Technical memo

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB

Personal Author(s) : HENDERSON,R.E.

Report Date : 04 OCT 1962

Pagination or Media Count : 59

Abstract : A theoretical method is presented for the design of a marine propeller with non-radial or skewed blades. The method is based on Weissinger's L-Method with each blade replaced by a bound vortex along its quarter chord line. The velocity induced by the complete bound and trailing vortex system along the three-quarter chord line is specified to satisfy the condition of tangency to the mean camber line. The effects of nonuniform inflow and finite-thickness are included. The induced velocity is calculated by applying the law of Biot-Savart to the vortex system representing the blade. The integration of this law for the trailing vortex system gives a solution consisting of the tabulated solution of Lerbs for an unskewed blade designed using Prandtl's lifting line theory plus an additional solution representing the effect of skew and the use of Weissinger's L-Method. (Author)

Descriptors :   *FLUID FLOW, *PROPELLERS (MARINE), BESSEL FUNCTIONS, CAVITATION, NUMERICAL INTEGRATION, LIFT, LOADING, NUMERICAL ANALYSIS, REAL VARIABLES, SURFACES, THEORY, THRUST, VELOCITY, VORTICES

Distribution Statement : APPROVED FOR PUBLIC RELEASE