An Investigation of the Scale Effect of Appendage Resistance of a Geometrically Similar Series of Models of the DD 710 Class
Abstract
To the authors' knowledge, the only published work which deals with appendage scale effect as derived from a geosim series is entitled "Some Results of Scale Effect Experiments on a Twin Screw Hull Series", by J.F. Allan, DSc., a paper which was presented at the Ninety-Third Session of the Institution of Engineers and Shipbuilders in Scotland. This paper presented the results of a study of both shafting with struts and bossings for three models, 18.70 ft., 22.96 fi., and 33.67 ft. in length, over a range of speed-length ratios from 0.50 to 0.80. However, the hull form used was not typical of modem, high-speed naval vessels. This thesis investigates the appendage scale effect phenomenon for shafting and struts of a modem, high-speed Destroyer-type ship, using models of 4.494 ft., 12.00 ft., 20.759 ft., and 29.46 ft. in length, and covering a range of speed-length ratios from 0.55 to 2.05. The models were tested in three appendage conditions, (1) with all appendages, (AA), (2) with rudders removed (WR), and (3) with rudders, shafting, struts, and fairwaters removed (BH). For this particular geosim series, there is a very definite scale effect, which effect varies according to the speed-length ratio, the scale effect being greatest at the lower speed-length ratios and diminishing at the higher speed-length ratios.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1998
- Accession Number
- ADA358320
Entities
People
- V. P. Klemm
- W. L. Buckingham
Organizations
- Naval Surface Warfare Center Carderock Division