NDLI: On the scale effect of thrust deduction in a judicious self-propulsion procedure for a moderate-speed containership

Content Provider	Springer Nature Link
Author	Lin, Tsung Yueh Kouh, Jen Shiang
Copyright Year	2014
Abstract	We studied the scale effect of the thrust deduction factor on an innovative self-propulsion procedure. In contrast to the International Towing Tank Conference (ITTC) committee documents, which adopt a skin friction corrector and also state that the thrust deduction factor is the same for both the model and full scales, complex interaction remains unresolved. Since the skin friction corrector is always calculated by an equation, to date no verifications of this equation have been published. In addition, the scale effect of the thrust deduction factor has seldom been studied because it is minor compared to that of the wake fraction. In the first section of this paper, the existence of the scale effect on the thrust deduction factor is proven and the misinterpretation of the equality is highlighted. Second, a balanced self-propulsion procedure, which does not use the skin friction corrector to isolate the propeller loading effect is proposed and compared to the conventional standard ITTC procedure. The study derived a simplified model for predicting the full-scale values for the thrust deduction factor correction. The new procedure was applied to a moderate-speed containership by CFD software and several characteristics were demonstrated. The scale correction model was verified from the computational results.
Starting Page	373
Ending Page	391
Page Count	19
File Format	PDF
ISSN	09484280
Journal	Journal of Marine Science and Technology
Volume Number	20
Issue Number	2
e-ISSN	14378213
Language	English
Publisher	Springer Japan
Publisher Date	2014-10-10
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thrust deduction Self-propulsion Scale effect CFD Automotive Engineering Engineering Fluid Dynamics Engineering Design Offshore Engineering Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering Mechanics of Materials Mechanical Engineering

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