Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire
The laboratory polyethylene wire with different core diameters of 3 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm and 12 mm was used to study the flame spread characteristics. The flame spread could be divided into initial oscillation stage, stable oscillation stage and burn-out stage. With the increase of the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X21004597 |
| _version_ | 1819106761154494464 |
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| author | Xinjie Huang Zhijie Zhou Jinda Gao Junjie Hu Changlong Wang Xiaofeng Zhang |
| author_facet | Xinjie Huang Zhijie Zhou Jinda Gao Junjie Hu Changlong Wang Xiaofeng Zhang |
| author_sort | Xinjie Huang |
| collection | DOAJ |
| description | The laboratory polyethylene wire with different core diameters of 3 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm and 12 mm was used to study the flame spread characteristics. The flame spread could be divided into initial oscillation stage, stable oscillation stage and burn-out stage. With the increase of the copper core diameter, the flame width and flame area increased firstly and then decreased. For wires with intermediate copper core diameters of 6 mm, 7 mm, 8 mm and 10 mm, the relationship between flame area and core diameter was established as A~dc, the total mass loss rate k with the copper core diameter dc followed as k~dc, and the combustion mass loss rate and dripping mass loss rate gradually equaled to each other at stable oscillation stage. By analyzing the temperature field during the process of flame spread, the temperature gradient was almost same for diameters from 3 mm to 10 mm, which demonstrated the radiation heat would be influenced by flame height. Combined with the increased flame spread, the dominant conduction heat transfer mechanism was built. When the diameter was 12 mm, the smaller conduction heat transfer, which illustrated the core material Cu played an cool effect on flame, thus the dominant heat transfer of Cu was changed from a heat source to a heat sink. |
| first_indexed | 2024-12-22T02:43:16Z |
| format | Article |
| id | doaj.art-6e6d1c46560d4704bd398f87bc101158 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-22T02:43:16Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-6e6d1c46560d4704bd398f87bc1011582022-12-21T18:41:35ZengElsevierCase Studies in Thermal Engineering2214-157X2021-10-0127101296Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wireXinjie Huang0Zhijie Zhou1Jinda Gao2Junjie Hu3Changlong Wang4Xiaofeng Zhang5School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China; Corresponding author. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, 53950364, China.School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, ChinaSchool of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, ChinaSchool of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, ChinaSchool of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, ChinaSchool of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui, 243002, ChinaThe laboratory polyethylene wire with different core diameters of 3 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm and 12 mm was used to study the flame spread characteristics. The flame spread could be divided into initial oscillation stage, stable oscillation stage and burn-out stage. With the increase of the copper core diameter, the flame width and flame area increased firstly and then decreased. For wires with intermediate copper core diameters of 6 mm, 7 mm, 8 mm and 10 mm, the relationship between flame area and core diameter was established as A~dc, the total mass loss rate k with the copper core diameter dc followed as k~dc, and the combustion mass loss rate and dripping mass loss rate gradually equaled to each other at stable oscillation stage. By analyzing the temperature field during the process of flame spread, the temperature gradient was almost same for diameters from 3 mm to 10 mm, which demonstrated the radiation heat would be influenced by flame height. Combined with the increased flame spread, the dominant conduction heat transfer mechanism was built. When the diameter was 12 mm, the smaller conduction heat transfer, which illustrated the core material Cu played an cool effect on flame, thus the dominant heat transfer of Cu was changed from a heat source to a heat sink.http://www.sciencedirect.com/science/article/pii/S2214157X21004597Electrical wiresPolyethyleneDiameter of copper coreFlame spreadDripping |
| spellingShingle | Xinjie Huang Zhijie Zhou Jinda Gao Junjie Hu Changlong Wang Xiaofeng Zhang Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire Case Studies in Thermal Engineering Electrical wires Polyethylene Diameter of copper core Flame spread Dripping |
| title | Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| title_full | Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| title_fullStr | Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| title_full_unstemmed | Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| title_short | Effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| title_sort | effect of copper core diameter on heat transfer and horizontal flame spread behaviors over electrical wire |
| topic | Electrical wires Polyethylene Diameter of copper core Flame spread Dripping |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X21004597 |
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