障碍物投影长度对海上可燃气云爆燃特性影响  

Influence of Obstacle Projection Length on Offshore Flammable Gas Cloud Deflagration Characteristics

作　　者：高占胜[1] 刘文鹏[1,2] 金良安 蒋晓刚[1] GAO Zhan-sheng;LIU Wen-peng;JIN Liang-an;JIANG Xiao-gang(Department of Navigation,Dalian Naval Academy,Dalian 116018,China;Unit 91404 of PLA,Qinhuangdao 066001,China)

机构地区：[1]海军大连舰艇学院航海系,辽宁大连116018 [2]解放军91404部队,河北秦皇岛066001

出　　处：《火力与指挥控制》2019年第11期88-92,共5页Fire Control & Command Control

基　　金：“十三五”国防预研基金资助项目(30203010303)

摘　　要：针对海上运输和军事行动中可燃气泄漏形成气云等问题,利用涡耗散模型,对6种障碍物投影长度(0 m^180 m)下海上可燃气云的形成和爆燃过程进行了数值模拟,重点研究障碍物表面及周围气云爆燃压力和温度特性的具体变化规律。结果表明,存在障碍物时气云湍流性增强,可燃气浓度分布更加不均匀;随着投影长度的增加,障碍物前方最大爆燃压力略增,但前表面无法形成持续高温;上方最大压力略降,投影长度小于100 m时高温持续时间显著增加;后方最大压力骤降,投影长度大于100 m时高温持续时间大幅缩短。结果可用于预测和评估不同投影长度下气云爆燃对船舶等障碍物的危害,为交通运输和军事行动中的安全防护等实际应用提供参考。For the problem of flammable gas leakage in the process of marine transportation and military action,such as the formation of flammable gas cloud,by eddy-dissipation model,the formation and deflagration process of offshore flammable gas cloud are numerically simulated with six kinds of obstacle projection length(0~180 m),the variation of gas cloud deflagration pressure and temperature characteristic in obstacle’s surface and surrounding is studied specifically.The results show that when the obstacle exists,the gas cloud is more turbulent and the flammable gas concentration distribution is more uneven.With the increase of projection length,the maximum deflagration pressure in front of the obstacle is slightly increased,but the front surface cannot form.The maximum pressure above is slightly lower,and the continuous time of high temperature significantly increases when projection length is less than 100 m.The maximum pressure rear is sudden drawdown,and the continuous time of high temperature significantly shortens when projection length is greater than 100 m.The results can be used to predict and evaluate the hazards of gas cloud deflagration on the ships or other obstacles under different projection lengths,and provide reference for practical applications such as safety protection in transportation and military operations.

关 键 词：海上可燃气云 爆燃特性 涡耗散模型 数值模拟 障碍物投影长度 

分 类 号：TJ99[兵器科学与技术—武器系统与运用工程] O383[理学—流体力学]