CAJ | 학술논문

V型旋转式阀芯具有流阻小,切断性能好,调节精度较高的特点。为了减小阀芯旋转时流体在阀芯和阀座棱边上剪切力以及阀门形阻系数,通常在阀芯的棱边上加工倒角来达到此目的,研究稳压器喷雾阀V型阀芯棱边不同倒角尺寸时,阀内流体流动时在阀芯与阀座上的产生的剪切力大小,以及阀芯棱边取不同倒角尺寸时对流动的各参数的影响。采用CFD软件fluent,基于RANS方程,采用有限体积法进行空间离散,使用K-ε湍流模型和SIMPLE算法,针对阀芯不同的倒角尺寸,计算稳压器喷雾阀V型阀芯在关闭时阀门的体积流量,湍流参数,壁面剪切力,形阻系数等各种参数。得到阀芯倒角对流动参数的影响规律。
V형선전식벌심구유류조소,절단성능호,조절정도교고적특점。위료감소벌심선전시류체재벌심화벌좌릉변상전절력이급벌문형조계수,통상재벌심적릉변상가공도각래체도차목적,연구은압기분무벌V형벌심릉변불동도각척촌시,벌내류체류동시재벌심여벌좌상적산생적전절력대소,이급벌심릉변취불동도각척촌시대류동적각삼수적영향。채용CFD연건fluent,기우RANS방정,채용유한체적법진행공간리산,사용K-ε단류모형화SIMPLE산법,침대벌심불동적도각척촌,계산은압기분무벌V형벌심재관폐시벌문적체적류량,단류삼수,벽면전절력,형조계수등각충삼수。득도벌심도각대류동삼수적영향규률。
The V-bal disc regulating valve is used widely in the fluid industry because of its advantages such as low shape resistance coefficient,good fluid-shear ability and high control ing accuracy.In order to reduce the wal shear stress on the disc and disc seat dur-ing the fluid flow inside the valve, its the disc edge needs to be chamfered. The V-bal disc is used for the presserizer spray control valve in the nuclear power station to regulate the flow.In order to find the relationship between the chamfer of the disc and the flow parameters,3D numerical simulations are carried out based on the RANS method and CFD software FLUENT which is built on finite volume method and K-ε and SIMPLE solver algorithm is employed during the calculations. From the numerical solution,it turns out that the chamfer on the edge of the V-bal disc increases with the increase of the volume flow rate,but reducing the shape resistance coefficient,increases the wal shear stress local y on the disc and disc seat.