The Wärtsilä air bubbling system
The importance of reducing friction between an icebreaker's hull and the ice or snow by hull lubrication has been known for a long time and bow screws have been used on ships designed for sub-Arctic conditions. These propellers, however, are at high risk in Arctic conditions and this prompted i...
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Language: | English |
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Cambridge University Press (CUP)
1978
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Online Access: | http://dx.doi.org/10.1017/s0032247400001868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400001868 |
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crcambridgeupr:10.1017/s0032247400001868 2024-09-15T18:31:19+00:00 The Wärtsilä air bubbling system Juurmaa, Kimmo 1978 http://dx.doi.org/10.1017/s0032247400001868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400001868 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 19, issue 119, page 121-127 ISSN 0032-2474 1475-3057 journal-article 1978 crcambridgeupr https://doi.org/10.1017/s0032247400001868 2024-08-07T04:04:18Z The importance of reducing friction between an icebreaker's hull and the ice or snow by hull lubrication has been known for a long time and bow screws have been used on ships designed for sub-Arctic conditions. These propellers, however, are at high risk in Arctic conditions and this prompted intensive research in the 1960's at the Oy Wärtsilä Ab Helsinki shipyard to try to find an alternative method for use on icebreakers venturing further north. The idea of using air bubbles to create a lubricating water stream arose from the investigations of the two phase propulsion system, in which the propulsive effect is obtained by mixing gas and liquid, carried out at the Helsinki University of Technology. Model testing and detailed design of the system started immediately, and the first installation was made in 1969 in the roll on roll off ferry MS Finncarrier (Fig 1). Article in Journal/Newspaper Polar Record Cambridge University Press Polar Record 19 119 121 127 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
The importance of reducing friction between an icebreaker's hull and the ice or snow by hull lubrication has been known for a long time and bow screws have been used on ships designed for sub-Arctic conditions. These propellers, however, are at high risk in Arctic conditions and this prompted intensive research in the 1960's at the Oy Wärtsilä Ab Helsinki shipyard to try to find an alternative method for use on icebreakers venturing further north. The idea of using air bubbles to create a lubricating water stream arose from the investigations of the two phase propulsion system, in which the propulsive effect is obtained by mixing gas and liquid, carried out at the Helsinki University of Technology. Model testing and detailed design of the system started immediately, and the first installation was made in 1969 in the roll on roll off ferry MS Finncarrier (Fig 1). |
format |
Article in Journal/Newspaper |
author |
Juurmaa, Kimmo |
spellingShingle |
Juurmaa, Kimmo The Wärtsilä air bubbling system |
author_facet |
Juurmaa, Kimmo |
author_sort |
Juurmaa, Kimmo |
title |
The Wärtsilä air bubbling system |
title_short |
The Wärtsilä air bubbling system |
title_full |
The Wärtsilä air bubbling system |
title_fullStr |
The Wärtsilä air bubbling system |
title_full_unstemmed |
The Wärtsilä air bubbling system |
title_sort |
wärtsilä air bubbling system |
publisher |
Cambridge University Press (CUP) |
publishDate |
1978 |
url |
http://dx.doi.org/10.1017/s0032247400001868 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400001868 |
genre |
Polar Record |
genre_facet |
Polar Record |
op_source |
Polar Record volume 19, issue 119, page 121-127 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247400001868 |
container_title |
Polar Record |
container_volume |
19 |
container_issue |
119 |
container_start_page |
121 |
op_container_end_page |
127 |
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1810472954023116800 |