Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures
Compressed air foam (CAF) is widely used as a high-performance extinguishing agent for liquid fuel fire. In this work, the effects of initial fuel surface temperatures (50–80 °C) on the drainage and evaporation of CAF were studied experimentally. It was found that at the same foam mass, the drain ra...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23010535 |
| _version_ | 1797422559509086208 |
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| author | Fengyuan Tian Jun Fang Lulu Fang Hassan Raza Shah Xuqing Lang Zhijian Tian Fei Tang |
| author_facet | Fengyuan Tian Jun Fang Lulu Fang Hassan Raza Shah Xuqing Lang Zhijian Tian Fei Tang |
| author_sort | Fengyuan Tian |
| collection | DOAJ |
| description | Compressed air foam (CAF) is widely used as a high-performance extinguishing agent for liquid fuel fire. In this work, the effects of initial fuel surface temperatures (50–80 °C) on the drainage and evaporation of CAF were studied experimentally. It was found that at the same foam mass, the drain rate is positively correlated to the initial fuel surface temperature. Furthermore, the drainage and evaporation with ER = 5.5 is less affected by the fuel surface temperature than ER = 10. Then the foam height was recorded and it was observed when the temperature is above 60 °C, the foam height with ER = 10 reduces rapidly at the beginning, while only slight thermal expansion occurs in ER = 5.5. In addition, the cooling effect of the foam was studied. The fuel layer temperature variation could be divided into three stages: rapid decline, relatively stable and gradual rise, which may relate to the foam drainage. But in the rapid decline state, the drop in fuel temperature is mainly related to the heat transfer between the fuel and foam. In addition, for the foam with ER = 10, the rising stage starts earlier. This work improves the understanding of mass loss and suppression mechanisms of fire-extinguishing foams. |
| first_indexed | 2024-03-09T07:34:02Z |
| format | Article |
| id | doaj.art-327c786c6d0b4f7d861f9965f3e60375 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-09T07:34:02Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-327c786c6d0b4f7d861f9965f3e603752023-12-03T05:41:31ZengElsevierCase Studies in Thermal Engineering2214-157X2023-12-0152103747Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperaturesFengyuan Tian0Jun Fang1Lulu Fang2Hassan Raza Shah3Xuqing Lang4Zhijian Tian5Fei Tang6State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR ChinaState Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR China; Corresponding author.State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR ChinaState Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR ChinaState Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, 266100, PR ChinaXCMG Fire-Fighting Safety Equipment Co., Ltd., Xuzhou, Jiangsu, 221100, PR ChinaState Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR China; Corresponding author.Compressed air foam (CAF) is widely used as a high-performance extinguishing agent for liquid fuel fire. In this work, the effects of initial fuel surface temperatures (50–80 °C) on the drainage and evaporation of CAF were studied experimentally. It was found that at the same foam mass, the drain rate is positively correlated to the initial fuel surface temperature. Furthermore, the drainage and evaporation with ER = 5.5 is less affected by the fuel surface temperature than ER = 10. Then the foam height was recorded and it was observed when the temperature is above 60 °C, the foam height with ER = 10 reduces rapidly at the beginning, while only slight thermal expansion occurs in ER = 5.5. In addition, the cooling effect of the foam was studied. The fuel layer temperature variation could be divided into three stages: rapid decline, relatively stable and gradual rise, which may relate to the foam drainage. But in the rapid decline state, the drop in fuel temperature is mainly related to the heat transfer between the fuel and foam. In addition, for the foam with ER = 10, the rising stage starts earlier. This work improves the understanding of mass loss and suppression mechanisms of fire-extinguishing foams.http://www.sciencedirect.com/science/article/pii/S2214157X23010535Compressed air foamFirefighting foamDrainageEvaporationMass loss mechanismCooling effect |
| spellingShingle | Fengyuan Tian Jun Fang Lulu Fang Hassan Raza Shah Xuqing Lang Zhijian Tian Fei Tang Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures Case Studies in Thermal Engineering Compressed air foam Firefighting foam Drainage Evaporation Mass loss mechanism Cooling effect |
| title | Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| title_full | Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| title_fullStr | Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| title_full_unstemmed | Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| title_short | Experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| title_sort | experimental study on mass loss mechanism and cooling effect of compressed air foam on fuel surface at different temperatures |
| topic | Compressed air foam Firefighting foam Drainage Evaporation Mass loss mechanism Cooling effect |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23010535 |
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