discharge section meaning in Chinese

排出部分
排水沟断面

The calculated results of cold nozzle flow are in agreement with some cold test one . through calculation , the parameter distributions of regulated nozzle flows were obtained . they state that the design of the regulated nozzle is reasonable , and its velocity loss at discharge section is less than 2 . 3 % comparison with no regulated nozzle
3 、计算结果与已有的试验结果对比相符，计算获得了可调喷管的流场参数分布，表明可调喷管的设计合理，与不可调喷管相比，流动的出口平均速度损失小于2 . 3 。