抄録
An experimental study is carried out for dividing flow through 90° T-junction of square cross-section. The Reynolds number based on the mean velocity at the main channel and the hydraulic diameter ranges from 1.3 X 103 to 2.0 X 104. The flow rate ratio (ratios between the flow rates in branch and main channel) is set at 0.2, 0.4, 0.6 and 0.8. The results show that the loss coefficient of branch channel increases with the increase of flow rate ratio, decreases with the increase of the Reynolds number. The empirical equations for loss coefficient are determined by the analysis of the experimental data. The velocity vector are measured by a PIV system to clarify the fluid flow characteristics .
