{"title":"坑内喷射火焰的火焰几何形状和温度分布","authors":"Kuibin Zhou, Zilong Rui, Ruixing Dong","doi":"10.1007/s10694-024-01647-0","DOIUrl":null,"url":null,"abstract":"<p>Underground pipelines of different burial depths are extensively utilized in the transportation industry for the conveyance of combustible gases. Failure of these pipelines could result in a jet fire in a pit (JFP), potentially endangering nearby pipes, structures, and individuals. The objective of this study is to analyze the flame geometry and temperature distribution of a JFP. A facility, comprising a jet fire apparatus and a rectangular pit, was constructed to experimentally simulate JFPs across three distinct burial depths and nineteen nozzle exit velocities. The JFP can manifest as an impinging jet flame (IJF), a transitional jet flame (TJF) or a jet flame ejected from the pit top (JFEPT), depending on the burial depth and nozzle exit velocity. An increase in burial depth reduces the critical velocities that differentiate these three flame patterns. Empirical correlations for the flame length and width of JFPs are developed, considering different burial depths, exit velocities, and pit dimensions. Additionally, two correlations available in the literature are validated for predicting the temperature distribution of TJF and JFEPT, respectively. These findings can inform the safety design of pipeline burial depths, considering the behavior of JFPs.</p>","PeriodicalId":558,"journal":{"name":"Fire Technology","volume":"25 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Flame Geometry and Temperature Distribution of Jet Fires in Pits\",\"authors\":\"Kuibin Zhou, Zilong Rui, Ruixing Dong\",\"doi\":\"10.1007/s10694-024-01647-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Underground pipelines of different burial depths are extensively utilized in the transportation industry for the conveyance of combustible gases. Failure of these pipelines could result in a jet fire in a pit (JFP), potentially endangering nearby pipes, structures, and individuals. The objective of this study is to analyze the flame geometry and temperature distribution of a JFP. A facility, comprising a jet fire apparatus and a rectangular pit, was constructed to experimentally simulate JFPs across three distinct burial depths and nineteen nozzle exit velocities. The JFP can manifest as an impinging jet flame (IJF), a transitional jet flame (TJF) or a jet flame ejected from the pit top (JFEPT), depending on the burial depth and nozzle exit velocity. An increase in burial depth reduces the critical velocities that differentiate these three flame patterns. Empirical correlations for the flame length and width of JFPs are developed, considering different burial depths, exit velocities, and pit dimensions. Additionally, two correlations available in the literature are validated for predicting the temperature distribution of TJF and JFEPT, respectively. These findings can inform the safety design of pipeline burial depths, considering the behavior of JFPs.</p>\",\"PeriodicalId\":558,\"journal\":{\"name\":\"Fire Technology\",\"volume\":\"25 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fire Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s10694-024-01647-0\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fire Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s10694-024-01647-0","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
Flame Geometry and Temperature Distribution of Jet Fires in Pits
Underground pipelines of different burial depths are extensively utilized in the transportation industry for the conveyance of combustible gases. Failure of these pipelines could result in a jet fire in a pit (JFP), potentially endangering nearby pipes, structures, and individuals. The objective of this study is to analyze the flame geometry and temperature distribution of a JFP. A facility, comprising a jet fire apparatus and a rectangular pit, was constructed to experimentally simulate JFPs across three distinct burial depths and nineteen nozzle exit velocities. The JFP can manifest as an impinging jet flame (IJF), a transitional jet flame (TJF) or a jet flame ejected from the pit top (JFEPT), depending on the burial depth and nozzle exit velocity. An increase in burial depth reduces the critical velocities that differentiate these three flame patterns. Empirical correlations for the flame length and width of JFPs are developed, considering different burial depths, exit velocities, and pit dimensions. Additionally, two correlations available in the literature are validated for predicting the temperature distribution of TJF and JFEPT, respectively. These findings can inform the safety design of pipeline burial depths, considering the behavior of JFPs.
期刊介绍:
Fire Technology publishes original contributions, both theoretical and empirical, that contribute to the solution of problems in fire safety science and engineering. It is the leading journal in the field, publishing applied research dealing with the full range of actual and potential fire hazards facing humans and the environment. It covers the entire domain of fire safety science and engineering problems relevant in industrial, operational, cultural, and environmental applications, including modeling, testing, detection, suppression, human behavior, wildfires, structures, and risk analysis.
The aim of Fire Technology is to push forward the frontiers of knowledge and technology by encouraging interdisciplinary communication of significant technical developments in fire protection and subjects of scientific interest to the fire protection community at large.
It is published in conjunction with the National Fire Protection Association (NFPA) and the Society of Fire Protection Engineers (SFPE). The mission of NFPA is to help save lives and reduce loss with information, knowledge, and passion. The mission of SFPE is advancing the science and practice of fire protection engineering internationally.