船用低温蒸馏海水淡化装置二级引射器的数值模拟  

Numerical Simulation of a Two-stage Ejector for Marine Low Temperature Distillation Seawater Desalination Plant

作　　者：冯东东[1] 张凤鸣[1] 吴沛衡 岳鹏飞[1] 陈顺权[1] 旷万军 

机构地区：[1]广州中国科学院先进技术研究所广东省膜材料和膜分离重点实验室,广州511458 [2]深圳市沃尔奔达新能源股份有限公司,深圳518103

出　　处：《集成技术》2016年第1期85-90,共6页Journal of Integration Technology

基　　金：深圳市技术开发项目(CXZZ20150528141008015);广东省重大科技专项粤港招标项目(2012A090200001);南沙区高新技术产业化项目(2013P013);广东省中国科学院全面战略合作项目(2013B091100003)

摘　　要：目前船用蒸馏海水淡化系统中,为减小装置体积并实现系统节能目标,引射器通常需要同时具有抽气和抽水功能,而传统的单级引射器只能形成单一真空度,从而影响淡水产率。文章提出了一种二级双吸口引射器设计方案,通过对引射器的流场特性进行数值模拟,分析结果表明入口流速和压力升高有利于提高真空度,而出口压力升高则会降低真空度。实验结果显示,在流速大于3.5 m/s时,模拟结果与实验数据基本一致,引射器吸口真空度可达到92%和90%,满足了船用引射器性能要求。In current marine low-temperature distillation seawater desalination plant, an ejector is designed to pump gas and water synchronously so as to reduce device size and energy consuming. In this paper, an ejector design scheme with two stages was investigated. Flow field characteristic of the proposed ejector was simulated to demonstrate that this design could increase inlet flow velocity and pressure which in turn could improve inlet vacuum and decrease vacuum. Real experiments were also carried out to validate the simulated results. The experimental results show that, when the flow velocity is larger than 3.5 m/s, vacuum at ejector suction can reach 92% and 90% respectively and meet the performance requirements of marine ejector.

关 键 词：引射器 数值模拟 真空度 低温蒸馏 

分 类 号：U664.591[交通运输工程—船舶及航道工程]