the sonic field transmission matrixes of perforated absorbent pipe is given after the transmission performance of perforated pipe is studied.
本文通过声波在穿孔声管中传播特性的研究,导出了声波在穿孔声管中传播的声场传递矩阵。
the results show that choosing perforated pipe with suitable structure and putting it into the thermosyphon can enhance the heat transfer effect.
结果表明,合理选择分流管的结构尺寸,将其置于热虹吸管内,可以起到强化沸腾换热的效果。
some general methods of dealing with intersection conflict are presented, such as double - well method, square - ditch method, perforated pipe method and return siphon method.
介绍了在处理雨、污水交叉管道交叉沖突时常用的一些方法(如双井法、偏方沟法、多孔管法)等。
compared with perforated pipe distributor, perforated weir-riser distributor has smaller wall flow, bigger operation elasticity and simpler structure, it is easy to install.