海底天然气水合物水力提升系统参数和提升性能作用规律  

Law of system parameters and lifting performance in marine gas hydrate hydraulic lifting system

作　　者：徐海良[1,2] 胡文港 杨放琼[1,2] XU Hailaing;HU Wengang;YANG Fangqiong(School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中南大学高性能复杂制造复杂制造国家重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2019年第4期837-844,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51775561);湖南省自然科学基金资助项目(2018JJ2522)~~

摘　　要：运用MATLAB软件分析天然气水合物水力提升系统水力损失、矿浆泵扬程与系统中固相体积分数、系统流量、颗粒粒径、管道直径之间的理论关系;建立绞刀头工作三维流场模型,运用计算流体力学理论和Fluent仿真软件对绞刀头工作区域内固液两相流场进行数值模拟,比较不同工作参数下流场出口和入口固相质量的比值达到95%时所需的绞吸流量。研究结果表明:当绞吸流量为1 000～1 300 m^3/h时,切削头绞吸效率最高,在该区间内,绞刀大环外径的分布范围为0.9～1.0 m,绞刀横移速度分布范围为0.07～0.11 m/s。The MATLAB software was used to analyze the theory relationship between the hydraulic loss, the lift of the slurry pump of the hydraulic lifting system for natural gas hydrate and the transmission parameters of the system, such as solid-phase volume, concentration system flow, particle size and pipe diameter. A three-dimensional flow field model of cutting head was established, the computational fluid dynamics theory and Fluent simulation software were employed to simulate the solid-liquid two-phase flow field in the working area of the cutting head, and the cutter-suction flow which made the ratio of solid phase mass between outlet and inlet is 95% with different work parameters was compared. The results show that the cutting head has the highest efficiency when the suction flow rate is 1 000-1 300 m ^3 /h. In this interval, the distribution range of reamer big ring outside diameter is 0.9-1.0 m, and the distribution range of traverse speed for cutter is 0.07-0.11 m/s.

关 键 词：天然气水合物 绞吸式 切削头 破碎量 模拟仿真 

分 类 号：TH231[机械工程—机械制造及自动化]