船用真空海水淡化装置液-汽引射器的数值模拟及试验研究  

Numerical Simulation and Experimental Study of the Liquid-steam Ejector of a Marine Vacuum Seawater Desalination Device

作　　者：王晓娟[1] 张博[1] 高春林[2] 杨东[3] 

机构地区：[1]西北工业大学航海学院 [2]91287部队 [3]海军驻西安地区航空军事代表室

出　　处：《热能动力工程》2011年第6期700-704,773-774,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50576078)

摘　　要：根据一维引射特性方程估算理想的用于船舶真空海水淡化装置的引射器参数,然后用数值计算和试验的方法对液-汽引射器的工作特性进行了研究。结果表明:随着工作流体压力的增大引射系数增大,一定程度后对引射系数的贡献不再显著;引射流体压力越大引射系数越大,但考虑到海水在低温下蒸发的要求引射流体压力不宜过高,工程中需综合考虑;喷嘴直径与接收室直径之比为0.4324时,引射器性能最佳。According to the one-dimensional ejection characteristic equation,predicted were the optimum ejection parameters of a marine vacuum seawater desalination device,then by using the numerical calculation and test methods,studied were the operation characteristics of the liquid-steam ejector.It has been found that with an increase of the pressure of the working fluid,the ejection coefficient will also increase.To a certain extent,the contribution of the increase of the pressure to the increase of the ejection coefficient will be no longer remarkable.The bigger the pressure of the ejection fluid,the bigger the ejection coefficient.However,with due consideration of the pressure of the ejection fluid being required to be not excessively high by the evaporation of seawater at a low temperature,decisions shall be made in a comprehensive way in engineering projects.When the ratio of the diameter of the nozzles and that of the reception chamber is 0.4324,the performance of the ejector is deemed as the optimum.The research findings and its research process can offer reference for further study of liquid-steam ejectors.

关 键 词：船用液-汽引射器 多相流 引射系数 

分 类 号：Q359[生物学—遗传学]