垂直ヘッダ型多分岐管における気液二相冷媒流の分配

抄録

Based on visual observations of refrigerant gas-liquid flows in a multi-pass channel that simulated a parallel-flow type evaporator, we examined qualitatively the effect of the multi-hole distributing pipe inserted in the dividing header on the uniformity of liquid distributions to branch tubes. The test channel had vertical headers and 22 horizontal branch tubes, and the distributing pipe had 21 outlet holes bored at the same pitch as branch tubes. We found that the refrigerant spouted from all holes of the pipe except under the lowest mass flow rate, and the uniformity of liquid distributions to branch tubes was much improved in comparison with the channel without the distributing pipe.