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为了解三通结构对过热器流量分配的影响从而解决三通集箱过热器的爆管问题,利用Fluent软件对过热器模型进行了数值模拟,研究了三通结构集箱过热器内的静压分布、速度分布、各支管流量分配及各支管入口处流体的流速分布和静压分布.结果表明:三通结构附近流体的压力低且速度大,而远离该区域的流体则压力高且速度小;三通中涡流区域的支管入口有小涡流,而其他区域的支管入口没有出现小涡流;集箱内涡流下部的支管流量偏小,正对集箱入口处的支管流量最大;将第7管屏和第11管屏的入口形状改为圆形,改造后支管的流量明显增大.
In order to understand the influence of the tee structure on the superheater flow distribution so as to solve the pipe burst problem of the three-way header superheater, the superheater model was numerically simulated by Fluent software and the static pressure Distribution and velocity distribution, flow distribution of each branch and distribution of fluid velocity and static pressure distribution at the inlet of each branch.The results show that the pressure of fluid near the three-way structure is low and the velocity is high, but the fluid far away from this area is high in pressure and small in velocity ; The eddy current in the tee section has a small vortex at the inlet of the branch, and no minor vortex at the branch inlet in other regions; the flow at the lower part of the vortex in the header is smaller, The shape of the entrance of the screen and the 11th tube screen is changed into a circle, and the flow of the branch tube after the transformation is obviously increased.