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Abstrakty
The configuration of a marine propulsion system is selected with regard to the maximum power resulting from its maximum design speed and displacement. The propulsion systems of high speed vessels use three or even four propellers, and each propulsion unit may be multi-engine. High speed vessels are designedfor maximum speeds, but their factual exploitation speed parameters are usually considerably lower - partial speed. In such cases particular propulsion propellers and engines need to be shut down. The idle propellers are dragged by the hull and they work in the so-called turbine work mode; they transfer torque to the shaft and generale negative thrust, i.e. additional resistance. Additional resistance contributes to reducing estimated speed of a vessel and increasing fuel consumption. What is more, torque generated on a propeller is transferred to the shaft and when friction resistance torque in shaft stuffing-boxes and bearings, transmission and, possibly, the propulsion engine is exceeded, mobile components rotate as a result, reaching considerable rotational speed values. torque and thrust on a propeller in this work mode may be estimated on the grounds of universal hydrodynamic characteristics of propellers. Universal hydrodynamic characteristics of propellers are used as reversion characteristics in evaluating the steering properties ofa vessel, and may be useful in evaluating resistance of free wheeling and locked propellers in marine multi-shaft propulsion systems. This paper presents charts of universal hydrodynamic characteristics of propellers for the full range of their rotational speed, the methodology and an example of calculating resistance of free wheeling and locked propellers for the given marine propulsion system.
Wydawca
Czasopismo
Rocznik
Tom
Strony
97--102
Opis fizyczny
Bibliogr. 13 poz., rys.
Twórcy
autor
- Gdynia Maritime University, Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland, achar@am.gdynia.pl
Bibliografia
- [1] Anfimov, V. N., Ustrijstwo i gidromechanika sudna, Sudostrojenie, Leningrad 1974
- [2] Basin, J. M.,Anfimov, V. N., Gidromechanika sudna, Recnoj transport, Leningrad 1964.
- [3] Basin, J. M., Miniovic, J. J. A., Teoria i rasciot grebnych vintov, Sudostrojenie, Leningrad 1963.
- [4] Charchalis, A., Opory okrętów wojennych i pędniki okrętowe, Akademia Marynarki Wojennej, Gdynia 2001.
- [5] Charchalis, A., Conditions of drive and diagnostic measurements during sea tests, Journal of KONES 2006.
- [6] Charchalis, A., Układy napędowe okrętów uderzeniowych, Zeszyty Naukowe Akademii Marynarki Wojennej, Nr 2/97, Gdynia 1981.
- [7] Charchalis, A., Propulsion systems of fast vessels with jet turbine engines, Marine Technology Transactions. Vol.4, -pp.23-33, Polish Academy of Since, Gdansk 1993.
- [8] Charchalis, A., Wyniki badań różnego typu kombinowanych układów napędowych okrętu szybkiego, Zeszyty Naukowe Wyższej Szkoły Marynarki Wojennej, Nr 4/71, Gdynia 1981.
- [9] Charchalis, A., Kryteria porównawcze układów napędowych szybkich okrętów wojennych, Zeszyty Naukowe Wyższej Szkoły Marynarki Wojennej, Nr 3/70 Gdynia 1981.
- [10] Jarzyna, H., Wzajemne oddziaływanie kadłuba i pędnika statku, Maszyny Przepływowe,Ossolineum, T. 14, 1993.
- [11] Jarzyna, H., Koronowicz, T., Szantyr, J., Design of Marine Propellers, Selected Problems. Maszyny Przepływowe, Ossolineum, T. 20, 1996.
- [12] Wojnowski, W., Okrętowe siłownie spalinowe cz. I, Akademia Marynarki Wojennej, Gdynia 1998.
- [13] Wojnowski, W., Okrętowe siłownie spalinowe cz. III, Akademia Marynarki Wojennej, Gdynia 2002.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ7-0017-0053