Author: Politis, Gerasimos K.

Source: Journal of Ship Research, Volume 49, Number 3, September 2005 , pp. 216-231(16)

Publisher: Society of Naval Architects and Marine Engineers (SNAME)

Abstract:

An efficient method for predicting the unsteady wake contraction and rollup of a wake-adapted marine propeller is presented. The method is based on a Morino formulation of the unsteady propeller problem for an observer in an inertia—motionless—coordinate system. Thus, such problems as a propeller in inclined flow or a propeller performing any general motion (for example, heaving) can be directly simulated by the proposed method, as a by-product. The heart of the method is a time-stepping algorithm by which the dynamic evolution of the free wake is calculated in the time domain, satisfying the Helmholtz vortex theorems. The method has been applied to a number of steady and unsteady flow cases, and results are presented, showing that stable rollup wake patterns for a wide range of control parameters can be produced accompanied by good predictions for propeller forces and pressure distributions.

Document Type: Research article

Publication date: 2005-09-01

More about this publication?

• The Journal of Ship Research is a quarterly publication providing highly technical papers on applied research in hydrodynamics, propulsion, ship motions, structures, and vibrations. While the Journal requires that papers present the results of research that advances ship and ocean science and engineering, most contributions bear directly on other disciplines, such as civil and mechanical engineering, applied mathematics, and numerical analysis. High quality papers are contributed from the U.S., Canada and overseas, with representation from established authorities as well as new researchers.
• Information for Authors
• Submit a Paper
• Subscribe to this Title
• Membership Information
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: General & Civil Engineering ,  Hydraulic & Environmental Engineering ,  Mechanical Engineering
• By this author: Politis, Gerasimos K.

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers