複数の分岐・合流部を有する矩形管内流れの圧力損失と流量分配

抄録

In this study, an experimental study is performed for multiple-passage duct flows. The multiple-passage is a reverse flow type, and consists of the five branch ducts. The duct flows are investigated from the view point of flow uniformity and pressure loss. Experiments are performed for the Reynolds number based on the bulk velocity and hydraulic diameter at the inlet duct from 6.0×10² to 1.5×10³ . Aspect ratio (i.e., the ratio between the height and width of the branch duct) is changed into 0.6, 1.0 and 20. The wall static pressure is measured, and the pressure loss and flow rate are evaluated. The results show that the pressure loss decreases and the flow rate in each branch passage improves by increasing the aspect ratio. The uniform flow distribution is realized by increasing the volume of the outlet chamber.