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Is wave height necessary to determine ship performance in calm water from measurements?

Is wave height necessary to determine ship performance in calm water from measurements?
Is wave height necessary to determine ship performance in calm water from measurements?
In order to monitor the performance of a vessel in calm seas it is important to ensure that the operational parameters are not biased by weather conditions. This paper makes a comparison between the relationship of true wind speeds obtained from on-board anemometer measurements and hindcast MetOcean data with the wave heights obtained from the MetOcean data. The insights obtained from the correlations between wind and waves is used to make a comparison calm water model derived from ‘wind-wave’ filtering and data filtered using only the wind speed. Finally, the increase in shaft power with respect to wind speed and wave heights for discrete intervals is presented. The results presented indicate that an average decrease of 4-5% in shaft power is seen when including an additional wave filter in the calm water model. However, this discrepancy improves when a stricter wind speed filtering is used.
335-346
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Hudson, Dominic
3814e08b-1993-4e78-b5a4-2598c40af8e7
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Hudson, Dominic
3814e08b-1993-4e78-b5a4-2598c40af8e7

Lakshmynarayanana, Puramharikrishnnan and Hudson, Dominic (2018) Is wave height necessary to determine ship performance in calm water from measurements? In 3rd Hull Performance and Insight Conference. pp. 335-346 .

Record type: Conference or Workshop Item (Paper)

Abstract

In order to monitor the performance of a vessel in calm seas it is important to ensure that the operational parameters are not biased by weather conditions. This paper makes a comparison between the relationship of true wind speeds obtained from on-board anemometer measurements and hindcast MetOcean data with the wave heights obtained from the MetOcean data. The insights obtained from the correlations between wind and waves is used to make a comparison calm water model derived from ‘wind-wave’ filtering and data filtered using only the wind speed. Finally, the increase in shaft power with respect to wind speed and wave heights for discrete intervals is presented. The results presented indicate that an average decrease of 4-5% in shaft power is seen when including an additional wave filter in the calm water model. However, this discrepancy improves when a stricter wind speed filtering is used.

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3rd HullPIC- Is wave height necessary for ship performance prediction?
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Published date: 12 March 2018

Identifiers

Local EPrints ID: 426303
URI: http://eprints.soton.ac.uk/id/eprint/426303
PURE UUID: ec71d75b-429a-4f3a-9c18-02baac99f1a4
ORCID for Dominic Hudson: ORCID iD orcid.org/0000-0002-2012-6255

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Date deposited: 22 Nov 2018 17:30
Last modified: 08 Aug 2020 01:32

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