ScholarLens Back to search
1970•Selected papers from the journal of the Society of Naval Architects of JapanRequires access

HYDRODYNAMICS OF SCREW PROPELLERS BASED ON A NEW LIFTING SURFACE THEORY

Kazuo Sugai

Open publisher page 1 citations

Abstract

Observation of the vortices from the tip of a wing with low aspect ratio has lead to a new lifting surface theory. This theory proposes that the bound vortices replacing the wing are not distributed over the projected surface onto the stream as in Prandtl's theory, but over the wing surface itself inclined to the stream, whereas the free vortices trail along the locus of the moving wing. The application of this theory to the marine propeller is discussed. A two dimensional integral equation for determination of the circulation on the blade is presented. Numerical solution is done by computer. Then the results are compared with the results from conventional theories.

About this research paper

What this paper is about

Observation of the vortices from the tip of a wing with low aspect ratio has lead to a new lifting surface theory. This theory proposes that the bound vortices replacing the wing are not distributed over the projected surface onto the stream as in Prandtl's theory, but over the wing surface itself inclined to the stream, whereas the free vortices trail along the locus of the moving wing. The application of this theory to the marine propeller is discussed. A two dimensional integral equation for determination of the circulation on the blade is presented. Numerical solution is done by computer. Then the results are compared with the results from conventional theories.

Why it matters

OpenAlex reports 1 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Observation of the vortices from the tip of a wing with low aspect ratio has lead to a new lifting surface theory. This theory proposes that the bound vortices replacing the wing are not distributed over the projected surface onto the stream as in Prandtl's theory, but over the wing surface itself inclined to the stream, whereas the free vortices trail along the locus of the moving wing. The application of this theory to the marine propeller is discussed. A two dimensional integral equation for determination of the circulation on the blade is presented. Numerical solution is done by computer. Then the results are compared with the results from conventional theories.

Key concepts: Vortex, Wing, Propeller, Surface (topology), Prandtl number, Wingtip vortices, Mechanics, Mathematics

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
HYDRODYNAMICS OF SCREW PROPELLERS BASED ON A NEW LIFTING SURFACE THEORY — Research Paper | ScholarLens