垂直管道水力输送的水击研究与AMESim仿真分析  

Water hammer of hydraulic transport in vertical pipe and AMESim simulation analysis

作　　者：李艳[1,2] 蒋坤[1] 唐达生[2] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]长沙矿冶研究院有限责任公司,深海矿产资源开发利用技术国家重点实验室,湖南长沙410012

出　　处：《广西大学学报（自然科学版）》2015年第2期412-420,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51174037;51104177);国家高技术研究发展计划(863计划)项目(2012AA091201)

摘　　要：为降低深海采矿中矿物垂直水力提升中的水击现象,根据垂直管固液两相流的特征,考虑固液两相流密度、浓度、弹性模量等特点,对垂直管水力提升不稳定流开展研究。推导出粗颗粒—匀质浆体两相流提升水击压力波波速方程、连续方程和运动方程,并且基于AMESim软件搭建了垂直管道水击仿真模型。分析了不同管道长度、不同管道直径以及不同颗粒浓度下的水击特性。仿真结果表明:每增加18 m管道长度,平均可以降低约12%的压力峰值,同时减小压力波对管道壁的冲击;每增加10 mm管道直径,也可以降低约7%的压力峰值,但流速增加,紊流强度增大;粗颗粒浓度每增加6%,压力峰值相应增加约2%,与此同时对管道壁的冲击也增加。研究方法及结论对于实际深海采矿中的垂直管道提升具有指导借鉴意义。In order to reduce the water hammer phenomenon in deep-sea mineral hydraulic hoisting, the unsteady coarse-grained solid-liquid flow in hydraulic hoisting is studied based on the characteristics of solid-liquid flows such as their density, concentration and elastic modulus. And the wave propagation speed equation, the continuity and momentum equation of water hammer in coarse grained solid-liquid flows are theoretically derived. Based on the mathematical model of hydraulic transport in vertical pipe and the software of AMESim, the simulation models are built, The characteristics of water hammer with different pipe length, diameter and volume fraction are analyzed. Simulation results indicate that by extending each additional pipe length 18 m, the pressure peak can be reduced about 12% on average and reduced the impact on the pipe wall of the pressure wave. And by extending each additional pipe diameter 10 mm, the pressure peak can be reduced about 7% on average, but the flow rate and the turbulence intensity will be increased. With each additional concentration of coarse paeticles 6%, the pressure peak can be reduced about 2% on average, but the impact on the pipe wall will be increased. The research methods and conclusions of this paper have special reference to actual deep-sea mineral hydraulic hoisting.

关 键 词：水力提升 水击 粗颗粒 AMESIM 

分 类 号：U177[交通运输工程] U177.8