000007679 001__ 7679
000007679 005__ 20240531164759.0
000007679 02470 $$2doi$$a10.24868/issn.2515-818X.2020.038
000007679 035__ $$a4497762
000007679 037__ $$aGENERAL
000007679 245__ $$aAUXILIARY PROPULSION MOTOR DRIVES IN WARSHIPS
000007679 269__ $$a2020-10-05
000007679 336__ $$aConference Proceedings
000007679 520__ $$aIncreasingly warships such as frigates and Offshore Patrol Vessels (OPV) are being used at slow-speeds either in constabulary duties or as part of a “poise and persistence without commitment” role to support other military activities. When operating in this way for long periods the main engine (ME) can be deleteriously affected and may require occasional loading-up to avoid coking etc. To avoid this, auxiliary motors are often provided to allow main engines to be rested to avoid maintenance related running hours. Sizing the motor is a trade-off between parameters such as: available Diesel Generator (DG) set power, together with the operational needs of the vessel, the fuel consumption, and emissions. This paper explores the solution space for the 90m Venator frigate design by studying a range of motors and converters of different ratings to see how these parameters are affected and to identify those which are most important to the ship’s roles. Military issues such as the crash-stop, lower noise, and heat signatures, loiter with persistence and redundancy are<br>
also explored together the vulnerability benefits. Operating in the littoral with a motor drive leads to less noisefrom main engines and gearboxes and makes better use of the ship’s DG sets which can be acoustically isolated. The upkeep benefits and the greater range of reversionary modes for propulsion should individual equipment, such as the controllable pitch propellers (CPP) are also addressed.
000007679 542__ $$fCC-BY-4.0
000007679 7001_ $$aBuckingham, J$$uBMT Defence & Security Limited
000007679 773__ $$tConference Proceedings of INEC
000007679 773__ $$jINEC 2020
000007679 789__ $$whttps://zenodo.org/record/4497762$$2URL$$eIsIdenticalTo
000007679 85641 $$uhttps://www.imarest.org/events/inec-2020$$yConference website
000007679 8564_ $$95a9eac06-7061-4835-8318-01bf1334a99c$$s2020604$$uhttps://library.imarest.org/record/7679/files/INEC_2020_Paper_56.pdf