级联式气-液旋流分离器流动特性数值研究
Numerical Study of the Flow Characteristics in a Cascade Gas-Liquid Cyclone Separator
耿坤 1孙治谦 1李腾 1孙铭泽 1王振波1
作者信息
- 1. 中国石油大学(华东)新能源学院,山东青岛 266580
- 折叠
摘要
为探究级联式气-液旋流分离器流场特性,了解短路流这一特殊流型对其性能影响,采用雷诺应力模型和离散颗粒模型对气、液两相流动特征进行数值模拟,通过Q准则对涡流特征进行识别.研究结果表明,级联式气-液旋流分离器一级旋流管内流动特性与传统旋流分离器相似,增加二级旋流管使级联式气-液旋流分离器内形成了大量的局部二次涡流.当入口气速为7 m/s时,级联式气-液旋流分离器中一级旋流区内短路流流量高达入口流量的70.28％;增设二级旋流管对改善分离器性能具有重要作用,两级分离后级联式气-液旋流分离器对直径6μm以上的液滴能够实现完全分离.本研究为气-液旋流分离器的结构开发和级联式气-液旋流分离器的应用提供了思路和基础数据.
Abstract
To investigate the flow field characteristics of the cascade gas-liquid cyclone separator and understand the impact of the short-circuit flow,a specific flow pattern,on its performance,the Reynolds stress model and discrete phase model were used to numerically simulate the flow characteristics of the gas-liquid flow in the separator;the Q criterion was used to identify eddy current features.The result shows that the flow characteristics in the primary cyclone tube of the cascade gas-liquid cyclone separator are the same as those of the conventional cyclone separator.The structural change made by adding secondary cyclone creates a large number of local secondary vortices in the cyclone separator.At an inlet gas velocity of 7 m/s,the short-circuit flow rate in the primary cyclone tube is up to 70.28％of the inlet flow.The addition of secondary cyclone is of great importance to improve the performance of the separator.After two stages of separation,the cyclone separator is able to achieve complete separation of droplet size above 6 μm.The study provides ideas and data basis for the structure development of gas-liquid cyclone separator and the application of cascade type gas-liquid cyclone separators.
关键词
级联式气-液旋流分离器/流动特性/Q准则/短路流Key words
cascade gas-liquid cyclone separator/flow characteristic/Q criterion/short-circuit flow引用本文复制引用
基金项目
中国石油重大科技项目(ZD2019-184-004)
山东省重大科技创新工程项目(2019JZZY010508)
出版年
2024
NETL
NSTL
万方数据