出口结构对水口与流体之间相互作用的影响  

Influence of Outlet Structure on Interactions of Fluids with Nozzles

作　　者：禄向阳[1,2,3] 王霄[2,3] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中钢集团洛阳耐火材料研究院有限公司,洛阳471039 [3]河南省特种耐火材料重点实验室,洛阳471039

出　　处：《硅酸盐通报》2009年第B08期160-163,共4页Bulletin of the Chinese Ceramic Society

基　　金：科研院所技术开发研究专项资金(No.074200510011)

摘　　要：作为功能耐火材料的连铸用浸入式水口使用条件苛刻,不仅要经受钢液、保化渣的侵蚀,而且受到高温流体的冲击。为了研究高温状态下水口的应力状态,本文通过流固耦合技术,采用有限元计算了流体与具有不同结构的浸入式水口之间的作用,结果表明:(1)具有梯形出口的水口内壁上角点速度最大,而且出现明显尖峰,该处的边缘曲线出现拐点,造成速度的突变,应力增大。(2)半圆形出口与梯形出口相比,速度峰值变化缓慢,高峰值速度区增加,建议水口结构设计时采用平滑过渡出口,减少附加惯性应力,增加产品使用的可靠性。The entry nozzle for casting is a functional refractory and is used in a severe environment, in which the nozzle are not only eroded by steel or slag, but impacted by the molten fluid. To research the status of the nozzle at high temperatures, the interactions of fluid with the nozzle with different outlet structures are studied by finite element approach through the FSI technology. The results show that ： （ 1 ） The velocity at corner joint of tapered outlet nozzle is maximal and peaks obviously exist. There is a inflection point on the fringe curve, as a result, the velocity is changed suddenly and the stress is increased. （2） Compared with tapered outlet nozzle, the value of velocity peaks for semicircular outlet nozzle change slowly and region of high velocity is increased. So it is suggested that smooth transition outlet for entry nozzle should be used with the aim to minimize the inertial stress and improve the using reliability for the products.

关 键 词：流固耦合 有限元 浸入式水口 

分 类 号：TG146.4[一般工业技术—材料科学与工程]