Propulsor


Propulsor

A propulsor is a mechanical device that gives propulsion.

The word is commonly used in the marine vernacular, and implies a mechanical assembly that is more complicated than a propeller. The Kort nozzle and Pump-jet are examples.

A propulsor, as can be seen in the accompanying picture has a shroud, which cuts down on blade-tip cavitation and radiated noise. It also has a rotor element and a stator. The stator concentrates the thrust in axial direction and reduces energy wasted in the tangential flow (therefore eliminating torque on the hull). The number of blades in the rotor & stator will typically be odd-numbered, and different prime numbers to avoid standing waves. The blades in the rotor or the stator may be angled to further reduce noise. The physical design and layout is very much similar to a single stage Axial-flow compressor.

ee also

*Z-drive <=> L-drive
*Voith-Schneider
*Axial-flow_compressor

External links

* [http://www.rolls-royce.com/marine/products/propulsion/default.jsp Rolls-Royce Marine]
* [http://www.schottel.de/index_e.htm Schottel marine propulsion]
* [http://www.flowserve.com/vgnfiles/Files/Literature/ProductLiterature/Pumps/pss-90-8.1-e.pdf Pleuger Propulsion]
* [http://www.voithturbo.de/vt_en_pua_marine_vspropeller.htm Voith Schneider® propulsors]
* [http://marinepropulsion.net/kort/nozzle.htm Kort nozzles]
* [http://www.fairplay-tugs.com/main/faq-all.php Tug boat FAQ]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • propulsor — PROPULSÓR, propulsoare, s.n. Organ de maşină sau aparat care serveşte la propulsarea unui vehicul. ♢ (Adjectival) Aparat propulsor. – Din fr. propulseur. Trimis de ana zecheru, 21.04.2004. Sursa: DEX 98  PROPULSÓR s. (tehn.) (rar) propulsant.… …   Dicționar Român

  • propulsor — propulsor, ra (Del lat. propulsor, ōris). adj. Que propulsa. U. t. c. s.) …   Diccionario de la lengua española

  • propulsor — |ô| adj. s. m. 1. Propulsivo. 2. O que transmite movimento a certos maquinismos. 3. O que faz progredir ou avançar …   Dicionário da Língua Portuguesa

  • Propulsor — ► adjetivo/ sustantivo Que propulsa: ■ el sistema propulsor del avión ha fallado. * * * propulsor, a adj. y n. Se aplica al que o lo que propulsa: ‘Un gran propulsor de las relaciones culturales hispano francesas’. ≃ Impulsor. * * * propulsor, ra …   Enciclopedia Universal

  • propulsor — {{#}}{{LM P31921}}{{〓}} {{[}}propulsor{{]}}, {{[}}propulsora{{]}} ‹pro·pul·sor, so·ra› {{《}}▍ adj./s.{{》}} Que sirve para propulsar …   Diccionario de uso del español actual con sinónimos y antónimos

  • propulsor — sə(r) noun ( s) Etymology: Latin propulsus (past participle of propellere) + English or : one that propels or produces a propulsive force use of hydrazine as a rocket propulsor …   Useful english dictionary

  • propulsor — pro|pul|sor Mot Agut Adjectiu variable …   Diccionari Català-Català

  • propulsór — s. n., pl. propulsoáre …   Romanian orthography

  • propulsor — Sinónimos: ■ motriz, hélice, remo, motor …   Diccionario de sinónimos y antónimos

  • propulsor — noun a ducted propeller swivelled to give forward, upward, or downward flight to an airship …   English new terms dictionary