蒸汽发生器旋叶式汽水分离器的数值模拟.pdf

第33卷第3期
舰船科学技术
2011年3月
SHIP SCIENCE AND TECHNOLOGY
Mar.,2011
蒸汽发生器旋叶式汽水分离器的数值模拟
庞天照',郭伟,郭涛2
(1.海军驻葫芦岛431厂军事代表室,辽宁葫芦岛125004;
2.华中科技大学船舶与海洋工程学院,湖北武汉430074)
摘要:采用 Fment计算流体动力学软件对2种不同分离筒直径的旋叶式汽水分离器的分离情况进行了数
值模找,得到了各出口水流量以及压降的变化关系。通过对各种影响因素的模拟以及对2种筒径的比较,结果表明
分离筒入口速度越大,则分离效果越好,减小筒径或减小含水量均可以使分离筒入口速度增加,从而提高分离效率。
但是,速度的提高会使压降急剧增加,可能对旋叶造成冲击,引起旋叶局部应力强度问题,使旋叶脱落。综上所述,推
荐采用直径300mm的分离筒进行分离。
关键词:旋叶;汽水分离器;数值模拟
中图分类号:TK124
文献标识码:A
文章编号:1672-7649(2011)03-0065-04DOI:10.3404/j.iss.1672-7649.2011.03.016
Numerical simulation study upon swirl vane steam-water separator in steam generator
PANG Tian-zhao GUO Wei.GUO Tao
(1. Navy Military Representative Department Resident in No 431 Plant, Ludao 125004, China
2. School of Naval Architecture and Ocean Engineering, Huazhong University of
Science and Technology, Wuhan 430074, China
Abstract: The flow of outlet water and the variation of pressure drop have been obtained through
comparing with the separation efficiency of two kind of rotary vane steam-water separators varied in diameter
of separating bowl using a kind of software Fluent which is powerful on computational fluid dynamies in the
paper. After lots of simulations and comparisons of two kind of separators, it is concluded that the higher the
inlet velocity of separation bowl is, the higher the separation efficiency is. In addition, with decline of the
bowl diameter or decrease of the water content, the inlet velocity of separating bowl will be increased as well
as improvement of the separation efficiency. However, the increase of velocity will make pressure drop
increased dramatically and rotating blades may be impacted by the steam-water mixture and make the blades
fall off, which lead to the problem of the local stress intensity. In summary, the separation of 300 mm
diameter of separating bowl will be better in separation efficiency and local stress, so I recommend it
Key words: rotary vane; steam-water separator; numerical simulation
0引言
蒸汽发生器广泛采用旋叶式汽水分离器作为粗分离
器。本文采用 Fluent计算流体动力学软件对2种不
旋叶式汽水分离器作为离心式分离器,由于具有同分离筒直径的旋叶式汽水分离器的分离情况进行
较高的分离效率,而且汽水混合物进入旋叶式汽水分数值模拟,计算获得了试验技术很难得到的分离器内
离器的方向与从传热管束出来的汽水混合物流向
部汽液相的流场及其体积分布云图,并且通过对汽液
致,可充分利用蒸汽发生器筒体的尺寸,因此核电站相流场的分析、对比,为分离器的设计提供依据
收稿日期:2010-06-30;修回日期:2010-10-09
作者简介:庞天照(1983-),男,学土,助理工程师,从:?帔制造与自动控制技术。
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