多分支管道若干流动现象和特性的探讨

在稳定的多分支管道流动中，对于相同的主管道流量，各分支管道中可以有不同的稳定流动状况与之对应．分支管道中的稳定流动状态，不仅取决于主管道中的流量，而且取决于主管道和分支管道中的流量调整变化过程．实验表明：对于具有相同尺寸，相同几何形状的多个分支管道而言，分支管道距主管道入口端的位置顺序越靠前，则通过该分支管道的流量越小．虽然实验中的多分支管道流动是属于非常复杂的湍流，但实验表明主管道的流量与各分支管道的流量之间存在一简单的线性关系．实验还表明，主管道入口的壁面静压与备分支管道出口的壁面静压之间存在抛物线关系．

Investigation of Several Phenomena and Properties of the Flows in Manifolds

In the steady flow in manifolds,there exist a number of stable flow states in the branches for the same main duct flow rate. The flow pattern in a branch depends not only on the flow rate through the manifold but also on the method of adjustment of the flow rate through the branch and the manifold.The experiments carried out show that the nearer to the manifold inlet a branch is located along the main duct, the smaller the flow rate through that branch. Although the experiments show that the flow in the manifold is a very complex turbulent flow,it was observed that there exists a very simple linear relationship between the flow rate in the main duct and that in each branch. It was also found that a parabolic relationship exists between the main duct flow rate and the wall static pressures at the exit of each branch and of the main duct.