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Estimating added power in waves for ships through analysis of operational data

Estimating added power in waves for ships through analysis of operational data
Estimating added power in waves for ships through analysis of operational data
The accuracy of added power estimation using full scale operational data is directly related to the accuracy of determining the calm water power. Firstly, this paper focuses on a detailed analysis of the calm water powering, using voyage (operation) data supported by and compared to standard estimation techniques and model test data. Further, a method to quantify the added power in weather is developed. The added power due to the influence of waves and wind is treated as the difference between measured shaft power and calm water power requirement. It is shown that both quality and quantity of data is important to model calm water power accurately. The operational data suggests that trim by stern is favorable at lower speeds and has little effect with increase in speed. The added power in waves for most operational speeds considered is less than 10%.
253-264
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Hudson, Dominic
3814e08b-1993-4e78-b5a4-2598c40af8e7
Bertram, Volker
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Hudson, Dominic
3814e08b-1993-4e78-b5a4-2598c40af8e7
Bertram, Volker

Lakshmynarayanana, Puramharikrishnnan and Hudson, Dominic (2017) Estimating added power in waves for ships through analysis of operational data. Bertram, Volker (ed.) In 2nd Hull Performance and Insight Conference: HullPIC'17. pp. 253-264 .

Record type: Conference or Workshop Item (Paper)

Abstract

The accuracy of added power estimation using full scale operational data is directly related to the accuracy of determining the calm water power. Firstly, this paper focuses on a detailed analysis of the calm water powering, using voyage (operation) data supported by and compared to standard estimation techniques and model test data. Further, a method to quantify the added power in weather is developed. The added power due to the influence of waves and wind is treated as the difference between measured shaft power and calm water power requirement. It is shown that both quality and quantity of data is important to model calm water power accurately. The operational data suggests that trim by stern is favorable at lower speeds and has little effect with increase in speed. The added power in waves for most operational speeds considered is less than 10%.

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Published date: 27 March 2017

Identifiers

Local EPrints ID: 426364
URI: http://eprints.soton.ac.uk/id/eprint/426364
PURE UUID: f2ebcf3f-00a4-4567-b825-709ec825cd7e
ORCID for Dominic Hudson: ORCID iD orcid.org/0000-0002-2012-6255

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Date deposited: 26 Nov 2018 17:30
Last modified: 08 Aug 2020 01:32

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