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              1. 暖通空调杂志社>期刊目次>2019年>第8期

                分水器三通管路减阻及优化设计*

                Resistance reduction and optimization design of three-way pipelines of manifolds

                张婉卿 李成 李安桂
                西安建筑科技大学

                摘要:

                针对供热工程、流体输配中常用的分水器三通管路存在流量分配不均、水力失调等问题,以分水器管路优化设计为研究对象,对分水器各支管三通的阻力特性进行了数值模拟研究。通过改变不同形式的导流片进行了分水器结构优化设计,对比了导流片在垂直与平行于主管流动方向2种安装方式下的减阻效果,获得了导流片减阻与流量分配均匀性的协同优化作用。研究发现,在流场中存在二次流的区域安装导流片可有效切割二次涡旋,垂直于主管流动方向安插长度为2倍支管直径的直插式导流片,单支管减阻率最大可达12.60%。本研究对优化T形三通结构设计以降低流动阻力具有推广应用价值。

                关键词:分水器,三通管路,导流片,减阻,流量分配,优化设计

                Abstract:

                In view of the problems of uneven flow distribution and hydraulic imbalance in the three-way pipeline of manifold commonly used in heating and fluid transmission and distribution systems, taking the optimization design of manifold pipeline as a research object, studies the resistance characteristics of each branch of the manifold by numerical simulation. Carries out the structure optimization design of the manifold by changing different forms of the guide vanes, and compares the resistance reduction effects of guide vanes under two installation modes of vertical and parallel to the main pipe flow direction. Obtains the synergistic optimization of resistance reduction and flow distribution uniformity of guide vanes. Finds that the installation of the guide vane in the area where exits secondary flow in the flow field can effectively cut the secondary vortex, and when insert a direct guide vane with a length of 2 times the diameter of the branch pipe perpendicular to the main flow direction, the maximum resistance reduction rate of the single branch pipe can be up to 12.60%. This study is valuable for optimizing the design of T-shaped three-way structure to reduce the flow resistance.

                Keywords:manifold,three-waypipeline,guidevane,resistancereduction,flowdistribution,optimizationdesign

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