稳流器结构对导流式消防水炮流动特性的影响  

Influence of flow stabilizer structure on fluid hydraulicperformance within diversion type fire fighting water cannon

作　　者：方正 向黎 乐党救 李浩翥 唐珏菁 沈雷虎 李栋[2] 赵传文 FANG Zheng;XIANG Li;LE Dangjiu;LI Haozhu;TANG Juejing;SHEN Leihu;LI Dong;ZHAO Chuanwen(East China Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Shanghai 200001,China;School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing,Jiangsu 210046,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200001 [2]南京师范大学能源与机械工程学院,江苏南京210046

出　　处：《排灌机械工程学报》2024年第2期154-160,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：中国电力工程顾问集团有限公司科技项目(GSKJ2-D06-2021)。

摘　　要：为了探究一种新的最佳星形稳流器结构形式,选取六肋式星形稳流器,设计了5种不同长度且交叉排列的星形稳流器.基于CFD对安装有5种不同结构形式的星形稳流器的导流式消防水炮内流体的流动特性展开了数值模拟研究,分析了不同稳流器布置形式对导流式消防水炮内流体速度分布均匀性、轴线速度以及湍动能的影响,并对不同布置形式下的压力降进行了分析.数值研究结果表明,稳流器可有效改善消防水炮内轴线速度分布并降低消防水炮的进出口湍动能差,分段叉排布置的稳流器可显著提升稳流效果.其中,数量为2、长度为40 mm且交叉布置的稳流器组合最有利于提升消防水炮的综合性能.同体积条件下,通过缩短单个稳流器长度,增加稳流器叉排数量的分段错位布置提升消防水炮的性能作用有限.过多数量的叉排布置会造成逆流以及较大的压力损失.研究结果对星形稳流器在消防水炮内的优化设计具有一定借鉴作用.In order to investigate a new and optimal structure form of star-shaped flow stabilizer,six-ribbed star-shaped stabilizer was selected and five different lengths of star-shaped stabilizer with cross arrangement were designed.Numerical simulations based on CFD were carried out for five types of diversion type fire fighting water cannon with different structures of flow stabilizer.The effect of flow stabilizer structure on the turbulent kinetic energy and axial velocity of the fluid in the fire fighting water cannon was analyzed.And the pressure drop under different arrangement forms was also analyzed.It shows that the installation of flow stabilizer can improve the axial velocity distribution and reduce the turbulent kinetic energy of the inlet and outlet of the fire fighting water cannon,and the forked-row arrangement of flow stabilizer can significantly improve the flow stabilization effect.Among them,the combination of 2,40 mm long and crossed flow stabilizers is the most favorable to improve the comprehensive performance of the fire fighting water cannon.Under the same volume condition,it is limited to improve the performance of the fire fighting water cannon by shortening the length of the stabilizer and increasing the number of fork rows in the flow stabilizer,and an excessive number of forked rows will cause reverse direction flow and large pressure loss.The research result provides some guidance on the application of star-shaped flow stabilizer within fire fighting water cannons.

关 键 词：导流式消防水炮 星形稳流器 湍动能 轴线速度 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程]