K_(2)CO_(3)添加剂细水雾作用下高压氢气喷射火特性研究  

Characteristics of high-pressure hydrogen jet fires with K_(2)CO_(3)additive water mist

作　　者：祝现礼 张佳庆 过羿 滕越 刘敏 章智慧 马鸿盛 王昌建[4,5] ZHU Xianli;ZHANG Jiaqing;GUO Yi;TENG Yue;LIU Min;ZHANG Zhihui;MA Hongsheng;WANG Changjian(State Grid Anhui Electric Power Co.,Ltd.Electric Power Science Research Institute,Hefei 230601,China;Anhui Provincial Key Laboratory of Electric Power Fire and Safety Protection,Hefei 230022,China;State Grid Zhejiang Electric Power Co.,Ltd.Electric Power Science Research Institute,Hangzhou 310000,China;School of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui International Joint Research Center on Hydrogen Safety,Hefei 230009,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院,合肥230601 [2]电力火灾与安全防护安徽省重点实验室,合肥230022 [3]国网浙江省电力有限公司电力科学研究院,杭州310000 [4]合肥工业大学土木与水利工程学院,合肥230009 [5]安徽国际氢能安全联合研究中心,合肥230009

出　　处：《安全与环境学报》2024年第11期4279-4286,共8页Journal of Safety and Environment

基　　金：国家电网公司总部科技项目(5419202219075A11ZN)。

摘　　要：为更好地抑制高压氢喷射火,研究了K_(2)CO_(3)添加剂细水雾作用下欠膨胀氢气喷射火特性。试验采用实心锥形细水雾喷嘴,考察细水雾在不同K_(2)CO_(3)添加剂质量分数、水平施加位置和施加压力下,对欠膨胀氢气喷射火火焰形态、火焰水平长度、羽流区温度及辐射的影响。试验采用摄像机、热电偶、辐射热流计分别测量火焰形态、空间指定点温度和辐射强度。结果表明,在含有K_(2)CO_(3)添加剂的细水雾作用下,氢气喷射火焰更明亮。细水雾压力较低(0.5 MPa)且施加位置位于火焰抬升位置时,氢气喷射火出现明显的火焰膨胀现象。通过与纯水细水雾进行对比发现,K_(2)CO_(3)添加剂细水雾对氢气喷射火稳定火焰长度、羽流区温度及热辐射的抑制效果明显,并且抑制效果随着K_(2)CO_(3)添加剂质量分数的增大而增大。To enhance the suppression of high-pressure hydrogen jet fires,this study focused on the characteristics of under-expanded hydrogen jet fires in the presence of K_(2)CO_(3)additive water mist.A solid conical water mist nozzle was used in the experiment to investigate the effects of water mist on the flame morphology,horizontal length,plume temperature,and radiation heat flux of underexpanded hydrogen jet fires.This was evaluated for various mass fractions of K_(2)CO_(3),as well as different horizontal positions and pressures of the water mist.Cameras,thermocouples,and radiant heat flux gauges were utilized to measure the flame shape,plume temperature,and radiation intensity at specific points.The results indicate that when the pressure of the water mist is low(e.g.,0.5 MPa)and the water mist is positioned at the flame lifting-off location,the introduction of water mist with the K_(2)CO_(3)additive causes the hydrogen flame to be brighter and experience rapid expansion.This leads to a significant increase in flame length,potentially posing secondary hazards to surrounding personnel and property.Water mist causes the hydrogen jet fire to deflect,with the flame deflection angle primarily determined by the kinetic energy of both the water mist and the jet fire,independent of the presence of the K_(2)CO_(3)additive.In comparison to pure water mist,K_(2)CO_(3)additive water mist reduces the steady horizontal flame length and lowers both the plume temperature and radiation heat flux.This effect can be attributed to the combined physical cooling effects of the water mist and the chemical suppression provided by the K_(2)CO_(3)additive.This indicates that water mist containing the K_(2)CO_(3)additive exhibits a more pronounced inhibitory effect on hydrogen jet fires.When the pressure of the water mist remains constant,increasing the mass fraction of the K_(2)CO_(3)additive from 1%to 5%significantly enhances this inhibitory effect.Additionally,no increase in radiation intensity is observed in relation to the flame expansio

关 键 词：安全工程 K_(2)CO_(3)添加剂细水雾 氢气喷射火 温度 热辐射 

分 类 号：X932[环境科学与工程—安全科学]