TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

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


Articles of The Transactions of KSRC








Roughness of propeller blade surface and its implications for propulsion performance



Full text article ( in russian)

Year

 
2019

Issue

 
390

Volume

 
4

Pages

 
11–26

Caption

 
Roughness of propeller blade surface and its implications for propulsion performance

Authors

 
Pustoshny A., Sverchkov A., Shevtsov S.

Keywords

 
propeller, roughness, friction resistance, protective coating, gradient metal-polymer coating, rotating disk tests.

DOI

 
10.24937/2542-2324-2019-4-390-11–26

Summary

 
Object and purpose of research. This paper studies friction forces due to surface roughness of propeller, as well as their implications for propulsion performance. The purpose of this study is to develop handy and straightforward recommendations for practical design of new propeller coatings and stronger propellers for ice-class ships
Subject matter and methods.Laboratory measurements of rotation resistance torque in turbulent flow performed on rotating disks with coatings of different roughness.
Main results. The study of coating effect upon hydrodynamic resistance of rotating disks enables a justified assessment of roughness effect (in particular, surface quality of various blade coatings) upon ship propulsion performance. This paper describes the effect of surface hardening upon blade roughness and propulsion performance of propellers.
Conclusion. The study made it possible to formulate surface roughness requirements for propellers that would mitigate or completely eliminate any deterioration of propulsion performance, in accordance with propeller manufacturing class stipulated in existing normative documents. These requirements must be taken into account in development of protective coatings and surface hardening techniques for propeller blades.

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

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