TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Towing resistance assessment method for modern icebreakers and ice-going vessels in open water



Full text article ( in russian)

Year

 
2020

Issue

 
391

Volume

 
1

Pages

 
29-41

Caption

 
Towing resistance assessment method for modern icebreakers and ice-going vessels in open water

Authors

 
Kosorotov A.

Keywords

 
viscous resistance, form-factor, coefficient of wave resistance, wetted surface, towing resistance, hull lines, ice-going ship

DOI

 
10.24937/2542-2324-2020-1-391-29-41

Summary

 
Object and purpose of research. This paper studies towing resistance assessment method in deep open water for icebreakers, supply vessels, and cargo vessels with high ice class.
Subject matter and methods.The method suggested in this paper is based on the regression analysis of model test data obtained as per the form-factor scheme. The paper also suggests full-scale extrapolation formulae for wave resistance coefficient Cw, form factor k, and viscous resistance allowance ΔCv obtained as per form-factor approach.
Main results. The method was intended for use both at the early stages of ship design and in the analysis of marine transport system operations. This paper is the first introduction of viscous resistance allowance ΔCv (taking into account formfactor k, ship speed and waterline length) to the literature dedicated to resistance calculation methods for ships. Coefficients for calculation of the wetted surface of ice-going vessel’s hull were updated according to the formula suggested by S. Muragin.
Conclusion. This paper gives a convenient calculation method for towing resistance of Arctic vessels that yields sufficiently accurate results for resistance in deep open water, which could be helpful in mathematical modeling and conceptual design.

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