Hydraulic Model Study of a Water Intake under Frazil Ice Conditions
A 1:24 scale hydraulic model study of a water intake under frazil ice conditions is presented. The intake, located 9 m below the surface of the St. Lawrence River in Massena, New York, has a through flow of 0.14 cu m/s. The model study, conducted in the refrigerated flume facility of the U.S. Army C...
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ftdtic:ADA099172 2023-05-15T15:55:49+02:00 Hydraulic Model Study of a Water Intake under Frazil Ice Conditions Tantillo,Thomas J COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1981-03 text/html http://www.dtic.mil/docs/citations/ADA099172 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA099172 en eng http://www.dtic.mil/docs/citations/ADA099172 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Hydrology Limnology and Potamology Snow Ice and Permafrost Air Condition Heating Lighting & Ventilating Fluid Mechanics *ICE *INLETS VELOCITY WATER FLOW PARTICLES MODEL TESTS PROTECTIVE EQUIPMENT RIVERS HYDRAULIC MODELS UNDERWATER STRUCTURES BUOYANCY *Water intakes *River ice *Frazil ice Saint Lawrence River LPN-CWIS-31393 Text 1981 ftdtic 2016-02-20T19:53:13Z A 1:24 scale hydraulic model study of a water intake under frazil ice conditions is presented. The intake, located 9 m below the surface of the St. Lawrence River in Massena, New York, has a through flow of 0.14 cu m/s. The model study, conducted in the refrigerated flume facility of the U.S. Army Cold Regions Research and Engineering Laboratory, investigated methods of minimizing the frazil ice blockage on the intake. Two protective structures were modeled and the relative benefits of each are presented. The additional cross-sectional area provided by the protective structures lowered the vertical velocity component of the intake water to 0.0027 m/s. At this velocity the buoyant force acting on the frazil ice particle is larger than the downward drag force, causing the particle to rise. The results demonstrate that under certain low flow conditions a protective structure can minimize frazil ice blockage problems. (Author) Text Cold Regions Research and Engineering Laboratory Ice permafrost Defense Technical Information Center: DTIC Technical Reports database Lawrence River ENVELOPE(-115.002,-115.002,58.384,58.384) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Hydrology Limnology and Potamology Snow Ice and Permafrost Air Condition Heating Lighting & Ventilating Fluid Mechanics *ICE *INLETS VELOCITY WATER FLOW PARTICLES MODEL TESTS PROTECTIVE EQUIPMENT RIVERS HYDRAULIC MODELS UNDERWATER STRUCTURES BUOYANCY *Water intakes *River ice *Frazil ice Saint Lawrence River LPN-CWIS-31393 |
spellingShingle |
Hydrology Limnology and Potamology Snow Ice and Permafrost Air Condition Heating Lighting & Ventilating Fluid Mechanics *ICE *INLETS VELOCITY WATER FLOW PARTICLES MODEL TESTS PROTECTIVE EQUIPMENT RIVERS HYDRAULIC MODELS UNDERWATER STRUCTURES BUOYANCY *Water intakes *River ice *Frazil ice Saint Lawrence River LPN-CWIS-31393 Tantillo,Thomas J Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
topic_facet |
Hydrology Limnology and Potamology Snow Ice and Permafrost Air Condition Heating Lighting & Ventilating Fluid Mechanics *ICE *INLETS VELOCITY WATER FLOW PARTICLES MODEL TESTS PROTECTIVE EQUIPMENT RIVERS HYDRAULIC MODELS UNDERWATER STRUCTURES BUOYANCY *Water intakes *River ice *Frazil ice Saint Lawrence River LPN-CWIS-31393 |
description |
A 1:24 scale hydraulic model study of a water intake under frazil ice conditions is presented. The intake, located 9 m below the surface of the St. Lawrence River in Massena, New York, has a through flow of 0.14 cu m/s. The model study, conducted in the refrigerated flume facility of the U.S. Army Cold Regions Research and Engineering Laboratory, investigated methods of minimizing the frazil ice blockage on the intake. Two protective structures were modeled and the relative benefits of each are presented. The additional cross-sectional area provided by the protective structures lowered the vertical velocity component of the intake water to 0.0027 m/s. At this velocity the buoyant force acting on the frazil ice particle is larger than the downward drag force, causing the particle to rise. The results demonstrate that under certain low flow conditions a protective structure can minimize frazil ice blockage problems. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Tantillo,Thomas J |
author_facet |
Tantillo,Thomas J |
author_sort |
Tantillo,Thomas J |
title |
Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
title_short |
Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
title_full |
Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
title_fullStr |
Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
title_full_unstemmed |
Hydraulic Model Study of a Water Intake under Frazil Ice Conditions |
title_sort |
hydraulic model study of a water intake under frazil ice conditions |
publishDate |
1981 |
url |
http://www.dtic.mil/docs/citations/ADA099172 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA099172 |
long_lat |
ENVELOPE(-115.002,-115.002,58.384,58.384) |
geographic |
Lawrence River |
geographic_facet |
Lawrence River |
genre |
Cold Regions Research and Engineering Laboratory Ice permafrost |
genre_facet |
Cold Regions Research and Engineering Laboratory Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA099172 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766391305024307200 |