On the Optimization of Overall Performance of Rudders (Second Report)

Autor:	Hideaki Miyata, Takao Inui
Rok vydání:	1979
Předmět:	Engineering Stern business.industry Position (vector) Hull Scale effects Structural engineering Rudder Overall performance Propulsion business Towing Marine engineering
Zdroj:	Journal of the Society of Naval Architects of Japan. 1979:18-25
ISSN:	1884-2070 0514-8499
DOI:	10.2534/jjasnaoe1968.1979.18
Popis:	In this Second Report, results are presented and discussed of a study of rudder optimisation from the resistance and propulsion points of view. A synthetic method of approach is used in contrast to the analytic method of the First Report. On the basis of Kumano's finding (in 1960-61) that the rudder occupies a near optimum position as a stern bulb aimed at stern wave cancellation, the Authors investigate, by towing tests and wave analysis, several unconventional rudder configurations. Also, possible improvement of self-propulsion factors is investigated in propulsion tests. Up to 7% improvement in propulsive performance is obtained; this is mainly attributable to stern wave cancellation. Viscous scale effects upon the main hull stern wave system are studied in the towed and self-propelled conditions with tow geosim models (L = 2.5 m and 10 m). Order from BSRA as No. 51,914.
Databáze:	OpenAIRE
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