Design Method for Contra-Rotating Propellers for High-Speed Crafts : Revising the Original Lerbs Theory in a Modern Perspective

Joint Authors

Brizzolara, Stefano
Tincani, Emilio P.
Grassi, Davide

Source

International Journal of Rotating Machinery

Issue

Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-18, 18 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2012-10-18

Country of Publication

Egypt

No. of Pages

18

Main Subjects

Mechanical Engineering

Abstract EN

The main theoretical and numerical aspects of a design method for optimum contrar-rotating (CR) propellers for fast marine crafts are presented.

We propose a reformulated version of a well-known design theory for contra-rotating propellers, by taking advantage of a new fully numerical algorithm for the calculation of the mutually induced velocities and introducing new features such as numerical lifting surface corrections, use of an integrated modern cavitation/strength criteria, a modified method to consider different numbers of blades among the two propellers, and to allow for an unloading function in the search for the optimal circulation distribution.

The paper first introduces the main theoretical principles of the new methods and then discusses the influence of the main design parameters on an emblematic example of application in the case of counter rotating propellers for a pod propulsor designed for fast planing crafts (35 knots and above).

American Psychological Association (APA)

Brizzolara, Stefano& Grassi, Davide& Tincani, Emilio P.. 2012. Design Method for Contra-Rotating Propellers for High-Speed Crafts : Revising the Original Lerbs Theory in a Modern Perspective. International Journal of Rotating Machinery،Vol. 2012, no. 2012, pp.1-18.
https://search.emarefa.net/detail/BIM-469765

Modern Language Association (MLA)

Brizzolara, Stefano…[et al.]. Design Method for Contra-Rotating Propellers for High-Speed Crafts : Revising the Original Lerbs Theory in a Modern Perspective. International Journal of Rotating Machinery No. 2012 (2012), pp.1-18.
https://search.emarefa.net/detail/BIM-469765

American Medical Association (AMA)

Brizzolara, Stefano& Grassi, Davide& Tincani, Emilio P.. Design Method for Contra-Rotating Propellers for High-Speed Crafts : Revising the Original Lerbs Theory in a Modern Perspective. International Journal of Rotating Machinery. 2012. Vol. 2012, no. 2012, pp.1-18.
https://search.emarefa.net/detail/BIM-469765

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-469765