The additional frictionalpressuredrop for vertical tubes due to its connection with the bend was accounted into the frictional component due to return flow.
回弯压力降除考虑回弯头的局部阻力外,还包括相连直管段受回弯影响而增加的压力降。
2
Experiments on heat transfer and frictionalpressuredrop of kerosene of single phase flow in the internally ribbed tube were conducted and compared with those of smooth tube.
To calculate discharge port pressure, this article considers the influence on frictionalpressuredrop in the gas and liquid two-phase flow between rod and tubing owing to rotation of rods.