A DESIGN METHOD OF THE DUCTED PROPELLER FOR LARGE SHIPS

This paper presents a practical design method of the ducted propeller for large ships, which was developed based on the research results of the ducted propeller for the 280000 DWT tanker "Thorsaga." The "AU-Da ducted propeller" was developed to provide high performance for large ships with respect to efficiency, cavitation and impeller strength. In analyzing the self-propulsion test results the duct/impeller system is treated as a propulsor, and the method of analysis to take only impeller as the propulsor is also adopted in a supplementary manner, since this method was found to be quite useful in determining the propeller particulars. In order to realize a reliable design by utilizing these two methods of analysis, two kinds of design charts, one for AU-Da ducted propeller series and the other for AU-Da Impeller series, were developed by conducting the systematic open test series. In addition, the procedure of impeller design from cavitation aspect, the method of estimating the self-propulsion factors in early design stage are also given in this design method as well as the model-ship correlation to allow prediction of full scale performance, and thus a practical design system of the ducted propeller for large ships is presented.

Corporate Authors:
Mitsui Shipbuilding and Engineering Company, Ltd

6-4 Tsukiji, 5-chome, Chuo-ku
Tokyo, Japan
Authors:
- Narita, H
Publication Date: 1980

Media Info

Pagination: p. 37-49
Serial:
- Mitsui Technical Review
- Issue Number: 108
- Publisher: Mitsui Shipbuilding and Engineering Company, Ltd

Subject/Index Terms

TRT Terms: Cavitation (Mechanics); Cavitation erosion; Ducted propellers; Performance; Propellers; Rotors; Tests; Vehicle design
Old TRIS Terms: Propeller design; Propeller efficiency; Propeller performance; Self propulsion
Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

Accession Number: 00325866
Record Type: Publication
Files: TRIS
Created Date: Mar 12 1981 12:00AM