基于欧拉法的消防水炮射流轨迹模型  

Jet trajectory model of fire water cannon based on Euler method

作　　者：白杨阳 刘长春 李存英 艾国栋 刘思齐 宋方智 BAI Yangyang;LIU Changchun;LI Cunying;AI Guodong;LIU Siqi;SONG Fangzhi(College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an Shaanxi 710054,China;Sany Automobile Manufacturing Co.,Ltd.,Changsha Hunan 410100,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]三一汽车制造有限公司,湖南长沙410100

出　　处：《中国安全科学学报》2024年第3期200-205,共6页China Safety Science Journal

基　　金：2021年度应急管理部消防救援局科技计划重点研发(2021XFZD01);陕西省2022年自然科学基础研究计划(2022JM-281);榆林市2020年科技计划(CXY-2020-032)。

摘　　要：为提高消防水炮射流轨迹预测精度,克服基于传统抛体理论描述“初速度不变,射流流量增加致使射程增加现象”所存在的困难,首先采用欧拉法,沿空气中水射流轨迹建立一维的质量守恒方程、轴向动量守恒方程和径向动量守恒方程;然后假设水柱和空气柱的轴向速度分布形状为“礼帽”形,并据此推导分析建立的守恒方程,进而建立消防水炮水射流轨迹计算模型;最后基于3个守恒方程,给出射流轨迹模型的数值计算流程,并与收集的试验数据进行比较验证,结果表明:所建模型的误差不超过10%。In order to improve the accuracy of fire water cannon jet trajectory prediction and overcome the difficulty of traditional parabolic theory to describe the phenomenon that"when the initial velocity is constant,the range increases with the increase of jet flow",first of all,the Euler method was used to establish a one-dimensional mass conservation equation along the trajectory of the water jet in the air,axial momentum conservation equations and the radial momentum conservation equations.Then,assuming that the axial velocity distribution of the water column and air column was in the shape of"bowler hat",the established conservation equations were derived and analyzed,and the fire water cannon water jet trajectory calculation model was established.Finally,based on three conservation equations,the numerical computation process of the jet trajectory model was given and verified with the collected experimental data.The results show that the error of this model is less than 10%.

关 键 词：欧拉法 射流轨迹 消防水炮 射程 卷吸空气 

分 类 号：X932[环境科学与工程—安全科学]