Assessment of propulsion performance modifications in the propulsion unit of ship in astern movement in ice

Assessment of propulsion performance modifications in the propulsion unit of ship in astern movement in ice

Author: K.Ye. Sazonov

Abstract

An assessment of propulsion performance modifications in the propulsion unit of ship in astern movement in ice was made. It is demonstrated that the modifications are due to ice effects upon the propulsor, which involve both propulsor speed reduction and additional ice thrust that might bring about an augmentation of ship speed. It is noted that in case of a relatively low level of ice effects upon the propulsor the propulsion performance will always drop by 8 - 10 %. It is proposed to take this into consideration when fixing the minimal propulsion unit power level. 
Key words: propulsor, ice moment, thrust, minimal power.

References

1. Riska K. The background of the powering requirements in the Finnish – Swedish ice class rules. // Maritime Research Seminar’99, VVT Symposium 199, Espoo, Finland, 2000, p. 91-106.
2. Sazonov K.E. Teoreticheskie osnovy plavanija sudov vo l'dah. SPb.: CNII im. akad. A.N.Krylova, 2010, 274 s.
3. Coj L.G., Andrjushin A.V., Shtrek A.A. Obosnovanie osnovnyh parametrov perspektivnyh krupnotonnazhnyh gazovozov dlja Arktiki. // Problemy Arktiki i Antarktiki, 2013, № 3(97), s. 46-56.
4. Andrjushin A.V. Teorija vzaimodejstvija grebnogo vinta so l'dom. Obespechenie jekspluatacionnoj prochnosti jelementov propul'sivnogo kompleksa sudov ledovogo plavanija i ledokolov. Diss. na soisk. uchen. step. dokt. tehn. nauk. – Spb., 2006,254 s.
5. Andrjushin A.V., Bezzubik O.N., Biculja A.V., Gappoev M.A. Ledovye nagruzki dlja rascheta prochnosti ledokol'nyh vintov. // Nauch.-tehn. sb. Rossijskogo morskogo registra sudohodstva, 2000, № 23, s.162-179.
6. Karulin E.B., Karulina M.M., Beljashov V.A., Belov I.M. Ocenka periodicheskih nagruzok, dejstvujushhih na grebnoj vint pri vzaimodejstvii so l'dom. // Nauch.-tehn. sb. Rossijskogo morskogo registra sudohodstva, – 2008. – Vyp.31. S.93 – 106.
7. Sazonov K.E. K vyboru scenariev vzaimodejstvija grebnyh vintov so l'dom. // Trudy Krylovskogo gosudarstvennogo nauchnogo centra, 2013, vyp. 74(358), s.147-158.
8. Beljashov V.A., Dmitriev D.S. Izmenenie kinematicheskih parametrov sistemy vint-val-dvigatel' pri vzaimodejstvii grebnogo vinta so l'dom. //Voprosy sudostroenija, ser. Proektirovanie sudov, 1984, vyp.41, s. 36-43.
9. Belyashov V.A., Grebenuk S. Ya. Influence of ice loads on propeller on the engine¢s braking parameters and ice-going qualities of the vessel. // Proc.14th. Int. Conf. on Port and Ocean Eng.,POAC-99, Helsinki,1999, Vol.2, pp.768-776.
10. Merkulov V.A., Jakovleva M.V. Nagruzhennost' valoprovodov sudov ledovogo plavanija i rekomendacii po ih proektirovaniju. // Voprosy sudostroenija, ser. Sudovye jenergeticheskie ustanovki, 1980, vyp.19, s. 82-98.


About author

Sazonov Kirill - DSc, Krylov State Research Centre, St. Petersburg
tel. +7 (812)415-45-23
kirsaz@rambler.ru



Issue: 38/39 (2015)


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UDC:  629.12:532.582.5.001.5
Pages:  97-100