Doorway flow from a reduced scale isothermal air/helium approach
This paper deals with an experimental study of buoyancy-induced gas flow at a doorway-like opening as part of a fire smoke propagation application. The experimental approach is based on a reduced scale air/helium protocol, which allows a wide range of density conditions to be studied. The flow at th...
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| Veröffentlicht in: | International journal of thermal sciences 2011-10, Vol.50 (10), p.1920-1929 |
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| container_issue | 10 |
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| container_title | International journal of thermal sciences |
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| creator | Lucchesi, C. Vauquelin, O. Pretrel, H. Bournot, Ph |
| description | This paper deals with an experimental study of buoyancy-induced gas flow at a doorway-like opening as part of a fire smoke propagation application. The experimental approach is based on a reduced scale air/helium protocol, which allows a wide range of density conditions to be studied. The flow at the opening has been studied for wide ranges of density (0.17–1.22)
kg/m
3, flow rate (20–600)
l/min and doorway width (0.4‑14)
cm usually associated with smoke propagation in life-size applications. The data set consists of measurements of flow thicknesses, spilling angles and laser tomography visualizations. The results show that flow behaviour is in harmony with the basic Bernoulli theory commonly applied to this type of flow. The value of the flow coefficient obtained with several density conditions corresponds to the behaviour found by Emmons for a given flow density. The magnitude of the spilling angle has been investigated and its dependency on the Froude number has been demonstrated. The opening width has a significant effect on flow behaviour and the associated spill plume. The reduction of the opening width enhances the mechanism of air entrainment and modifies the position of the transition height at which plume cross sections change from being rectangular to circular in shape. |
| doi_str_mv | 10.1016/j.ijthermalsci.2011.04.016 |
| format | Article |
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kg/m
3, flow rate (20–600)
l/min and doorway width (0.4‑14)
cm usually associated with smoke propagation in life-size applications. The data set consists of measurements of flow thicknesses, spilling angles and laser tomography visualizations. The results show that flow behaviour is in harmony with the basic Bernoulli theory commonly applied to this type of flow. The value of the flow coefficient obtained with several density conditions corresponds to the behaviour found by Emmons for a given flow density. The magnitude of the spilling angle has been investigated and its dependency on the Froude number has been demonstrated. The opening width has a significant effect on flow behaviour and the associated spill plume. The reduction of the opening width enhances the mechanism of air entrainment and modifies the position of the transition height at which plume cross sections change from being rectangular to circular in shape.</description><identifier>ISSN: 1290-0729</identifier><identifier>EISSN: 1778-4166</identifier><identifier>DOI: 10.1016/j.ijthermalsci.2011.04.016</identifier><language>eng</language><publisher>Kidlington: Elsevier Masson SAS</publisher><subject>Applied sciences ; Building technical equipments ; Buildings ; Buildings. Public works ; Buoyancy ; Buoyancy flow ; Density ; Doorway ; Exact sciences and technology ; Fire behavior of materials and structures ; Fire protection ; Flow rate ; Helium ; Physics ; Plumes ; Reduction ; Smoke ; Spill plume ; Spilling</subject><ispartof>International journal of thermal sciences, 2011-10, Vol.50 (10), p.1920-1929</ispartof><rights>2011</rights><rights>2015 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c420t-901c9fa66532e3f53c01314aa0c68d6a53b03479f44f510f469c540d4798b5a93</citedby><cites>FETCH-LOGICAL-c420t-901c9fa66532e3f53c01314aa0c68d6a53b03479f44f510f469c540d4798b5a93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1290072911001347$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24433229$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-01459984$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Lucchesi, C.</creatorcontrib><creatorcontrib>Vauquelin, O.</creatorcontrib><creatorcontrib>Pretrel, H.</creatorcontrib><creatorcontrib>Bournot, Ph</creatorcontrib><title>Doorway flow from a reduced scale isothermal air/helium approach</title><title>International journal of thermal sciences</title><description>This paper deals with an experimental study of buoyancy-induced gas flow at a doorway-like opening as part of a fire smoke propagation application. The experimental approach is based on a reduced scale air/helium protocol, which allows a wide range of density conditions to be studied. The flow at the opening has been studied for wide ranges of density (0.17–1.22)
kg/m
3, flow rate (20–600)
l/min and doorway width (0.4‑14)
cm usually associated with smoke propagation in life-size applications. The data set consists of measurements of flow thicknesses, spilling angles and laser tomography visualizations. The results show that flow behaviour is in harmony with the basic Bernoulli theory commonly applied to this type of flow. The value of the flow coefficient obtained with several density conditions corresponds to the behaviour found by Emmons for a given flow density. The magnitude of the spilling angle has been investigated and its dependency on the Froude number has been demonstrated. The opening width has a significant effect on flow behaviour and the associated spill plume. The reduction of the opening width enhances the mechanism of air entrainment and modifies the position of the transition height at which plume cross sections change from being rectangular to circular in shape.</description><subject>Applied sciences</subject><subject>Building technical equipments</subject><subject>Buildings</subject><subject>Buildings. Public works</subject><subject>Buoyancy</subject><subject>Buoyancy flow</subject><subject>Density</subject><subject>Doorway</subject><subject>Exact sciences and technology</subject><subject>Fire behavior of materials and structures</subject><subject>Fire protection</subject><subject>Flow rate</subject><subject>Helium</subject><subject>Physics</subject><subject>Plumes</subject><subject>Reduction</subject><subject>Smoke</subject><subject>Spill plume</subject><subject>Spilling</subject><issn>1290-0729</issn><issn>1778-4166</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkF1LwzAUhosoOKf_oQgiXrQ7adK08cqxqRMG3uh1OEsTltEtM9kH-_embAwvvUo4efK-hydJ7gnkBAgfLHK72My1X2IblM0LICQHlseni6RHqqrOGOH8Mt4LARlUhbhObkJYAEAlQPSSl7Fzfo-H1LRunxrvlimmXjdbpZs0KGx1aoM7VaRo_WCuW7uN1HrtHar5bXJlYrm-O5395Pvt9Ws0yaaf7x-j4TRTrIBNJoAoYZDzkhaampIqIJQwRFC8bjiWdAaUVcIwZkoChnGhSgZNHNWzEgXtJ0_H3Dm2cu3tEv1BOrRyMpzKbgaElULUbEci-3hk44o_Wx02cmmD0m2LK-22QcZlKlJxWkfy-Ugq70Lw2pyjCcjOsFzIv4ZlZ1gCi208fn441WBnynhcKRvOCQVjlBZFt_r4yOnoZ2e1lzFJr6Jh67XayMbZ_9T9Agk6lm8</recordid><startdate>20111001</startdate><enddate>20111001</enddate><creator>Lucchesi, C.</creator><creator>Vauquelin, O.</creator><creator>Pretrel, H.</creator><creator>Bournot, Ph</creator><general>Elsevier Masson SAS</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>1XC</scope></search><sort><creationdate>20111001</creationdate><title>Doorway flow from a reduced scale isothermal air/helium approach</title><author>Lucchesi, C. ; Vauquelin, O. ; Pretrel, H. ; Bournot, Ph</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c420t-901c9fa66532e3f53c01314aa0c68d6a53b03479f44f510f469c540d4798b5a93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Applied sciences</topic><topic>Building technical equipments</topic><topic>Buildings</topic><topic>Buildings. Public works</topic><topic>Buoyancy</topic><topic>Buoyancy flow</topic><topic>Density</topic><topic>Doorway</topic><topic>Exact sciences and technology</topic><topic>Fire behavior of materials and structures</topic><topic>Fire protection</topic><topic>Flow rate</topic><topic>Helium</topic><topic>Physics</topic><topic>Plumes</topic><topic>Reduction</topic><topic>Smoke</topic><topic>Spill plume</topic><topic>Spilling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lucchesi, C.</creatorcontrib><creatorcontrib>Vauquelin, O.</creatorcontrib><creatorcontrib>Pretrel, H.</creatorcontrib><creatorcontrib>Bournot, Ph</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>International journal of thermal sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lucchesi, C.</au><au>Vauquelin, O.</au><au>Pretrel, H.</au><au>Bournot, Ph</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Doorway flow from a reduced scale isothermal air/helium approach</atitle><jtitle>International journal of thermal sciences</jtitle><date>2011-10-01</date><risdate>2011</risdate><volume>50</volume><issue>10</issue><spage>1920</spage><epage>1929</epage><pages>1920-1929</pages><issn>1290-0729</issn><eissn>1778-4166</eissn><abstract>This paper deals with an experimental study of buoyancy-induced gas flow at a doorway-like opening as part of a fire smoke propagation application. The experimental approach is based on a reduced scale air/helium protocol, which allows a wide range of density conditions to be studied. The flow at the opening has been studied for wide ranges of density (0.17–1.22)
kg/m
3, flow rate (20–600)
l/min and doorway width (0.4‑14)
cm usually associated with smoke propagation in life-size applications. The data set consists of measurements of flow thicknesses, spilling angles and laser tomography visualizations. The results show that flow behaviour is in harmony with the basic Bernoulli theory commonly applied to this type of flow. The value of the flow coefficient obtained with several density conditions corresponds to the behaviour found by Emmons for a given flow density. The magnitude of the spilling angle has been investigated and its dependency on the Froude number has been demonstrated. The opening width has a significant effect on flow behaviour and the associated spill plume. The reduction of the opening width enhances the mechanism of air entrainment and modifies the position of the transition height at which plume cross sections change from being rectangular to circular in shape.</abstract><cop>Kidlington</cop><pub>Elsevier Masson SAS</pub><doi>10.1016/j.ijthermalsci.2011.04.016</doi><tpages>10</tpages></addata></record> |
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| ispartof | International journal of thermal sciences, 2011-10, Vol.50 (10), p.1920-1929 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Building technical equipments Buildings Buildings. Public works Buoyancy Buoyancy flow Density Doorway Exact sciences and technology Fire behavior of materials and structures Fire protection Flow rate Helium Physics Plumes Reduction Smoke Spill plume Spilling |
| title | Doorway flow from a reduced scale isothermal air/helium approach |
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