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

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.