CAJ | 학술논문

不同结构来流管对联箱内工质流动影响较大，对运行经济性及设备安全意义重大。利用Fluent 软件对直管来流与弯管来流的流动对联箱内部流动的影响进行研究，在不同入口工况0．60，0．66，0．72，0．78 m ／s 下，采用 k －εRNG 湍流模型，对比联箱中心截面速度分布，根据各支管平均出口速度 Vi、支管压降Δpi 分布和轴线 X 方向分速度 Vx 大小进行分析。结果表明，弯管来流的流动较为单一，主流冲击联箱壁面情况较少，在不同的工况下，弯管来流的支管速度不均匀性仅为直管的44％左右，采用弯管来流能够明显提高联箱流量分配的效果。
불동결구래류관대련상내공질류동영향교대，대운행경제성급설비안전의의중대。이용Fluent 연건대직관래류여만관래류적류동대련상내부류동적영향진행연구，재불동입구공황0．60，0．66，0．72，0．78 m ／s 하，채용 k －εRNG 단류모형，대비련상중심절면속도분포，근거각지관평균출구속도 Vi、지관압강Δpi 분포화축선 X 방향분속도 Vx 대소진행분석。결과표명，만관래류적류동교위단일，주류충격련상벽면정황교소，재불동적공황하，만관래류적지관속도불균균성부위직관적44％좌우，채용만관래류능구명현제고련상류량분배적효과。
The structure of inlet pipe has a great influence on the flow inside the header,which could cause an economy and safety drop of the whole equipment.The Fluent software was used to study headers of vertical inlet and curved inlet pipes,with the different flow rates of 0.60 m /s、0.66 m /s、0.72 m /s and 0.78 m /s set and the turbulence model of k -εRNG was used.By studying the distributions differences of velocity in centre section,average outlet velocities of branch pipes Vi ,pressure drop Δpi and the velocity along axis X Vx.The conclusion was made that flow in the header of vertical inlet was more complicated, and the flow impacted against the wall more.All of flow rates,branch pipe velocity nonuniformity of verti-cal was only 44% of the curved,it could better the flow rate distribution of the header.