水滴粒径对旋叶式汽水分离器性能的影响  

Effect of Droplet Size on Swirl Vane Separator Performance

作　　者：杨雪龙[1,2] 王永[1,2] 冯靖[1,2] 王伟[1,2] 王先元[1,2] 

机构地区：[1]核动力运行研究所,湖北武汉430074 [2]中核武汉核电运行技术股份有限公司,湖北武汉430223

出　　处：《原子能科学技术》2016年第12期2200-2205,共6页Atomic Energy Science and Technology

摘　　要：采用计算流体动力学技术计算分析了水滴粒径对旋叶式汽水分离器性能及其内部流动细节的影响。采用Euler双流体模型结合均值粒径方法计算了分离器内两相流动，粒径选取范围为0.1～150μm ；通过分析流场细节揭示了粒径与分离器性能的内在关系。结果表明：随粒径的增大，压损呈先升后降趋势，分离效率呈“S”型增大趋势；对分离效率产生影响的粒径范围为5～150μm ，而对压损产生影响的粒径范围为大于5μm ；与试验值相比，计算所得压损相对偏差均在4.8％以内，且选用合适的粒径能获得较为准确的分离效率和出口湿度，表明本文计算方案较为可靠；蒸汽流量分配比和水分返流比均随粒径的增大而减小，而返流水分占出水总量的比例较高，可达48％，因此计算中必须加以考虑，建议计算域中加入外围空间。The computational fluid dynamics technique was adopted to calculate and ana‐lyze the influence of droplet size on the swirl vane separator performance and internal flow details .The Euler two‐fluid model with the mean particle size method was utilized to calculate the two‐phase flow in the separator ,with the particle size in the range of 0.1‐150 μm .By analyzing the flow field details ,the internal relations were revealed between the particle size and the separation performance .The results show that the pressure loss declines after the first rise with the increase of particle size ,while the sep‐aration efficiency has an “S” type increasing trend .The particle size having impact on the separation efficiency is in the range of 5‐150 μm ,w hile that of the pressure loss is in the range of greater than 5 μm .Compared with the experimental results ,the calculated pressure loss has a relative deviation within 4.8% ,and the appropriate choice of the particle size contributes to a more accurate separation efficiency and outlet humidity , and the calculation method is proved to be reliable .The steam flow distribution ratio＆amp;nbsp;and water reflux ratio decrease with the increase of particle size ,while the ratio of the reflux water accounting for the total amount of water is high ,up to 48 % ,and therefore it must be considered in the calculation ,and the peripheral space is proposed to be con‐sidered in the computational domain .

关 键 词：汽水分离器 水滴 多相流 水滴粒径 蒸汽发生器 

分 类 号：TK124[动力工程及工程热物理—工程热物理]