2012 Fiscal Year Final Research Report
Investigation on anti-icing and deicing focused on the brine contained in the seawater spray icing
| Project/Area Number |
22310110
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Hokkaido University of Education |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NOUJOU Ayumu 北海道教育大学, 教育学部, 教授 (20311524)
MATSUZAWA Takatoshi 独立行政法人海上技術安全研究所, その他部局等, 研究員 (00443242)
UTO Shoutarou 独立行政法人海上技術安全研究所, その他部局等, 研究員 (40358396)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKIMOTO Tadanaori 独立行政法人海上技術安全研究所, その他部局等, 研究員 (20466238)
SHIMODA Haruhito 独立行政法人海上技術安全研究所, その他部局等, 研究員 (30505102)
WAKOU Daisuke 独立行政法人海上技術安全研究所, その他部局等, 研究員 (40505103)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 雪氷災害 / 自然災害 / 水圏現象 / 減災 / 雪氷 / 着氷 |
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| Research Abstract |
Weather condition and marine condition during sea spray icing was analyzed using field data: the growth rate of cross section of icing monotonically increasedwith the product of air temperature and wind speed. We developed a method employingstatic ropes in order to withstand the fluttering and the effect of green water. Saline ice adhesion tests of hydrophobic/hydrophilic polymer sheets were performed by coldexperiments in laboratories. In particular, the adhesion strength of the hydrophilicmaterial decreased remarkably as the salinity increased. The spray icing tests were verified by cold experiments conducted using an ice model basin. Exfoliation of pieces of the membranous ice was often observed during the initial growth. The highly hydrophilicsheets could be effectively used to achieve deicing due to the low adhesion strength of the saline ice and exfoliation. A combination of low adfreeze property and rapid distortion was effective for the deicing of sea spray icing.
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