一、管道中流速的突变引起“水击”控制管道中液体的“水击”比较复杂,这是管道设计的—个重要方面。如果没有有效地控制“水击”,将造成巨大损失。非稳定流分析不但能判断是否将产生“水击”,而且可能作出减小“水击”的最佳设计。据“输送部”(DOT)规定:管道发生“水击”管道设计要依据控制和保护设备把“水击”压力控制在 First, the sudden changes in the flow rate in the pipe caused “water hammer” to control the “water hammering” of the liquid in the pipe. This is an important aspect of pipeline design. Without effective control of “water hit”, will cause huge losses. Unsteady flow analysis can not only determine whether “water hammer” will occur, but may also make the best design to reduce “water hammer.” According to the “Department of Transportation” (DOT) regulation: “water hammering” on the pipelines should be based on control and protection equipment to “water hammer” pressure control at