Water hammer is a transient flow phenomenon generated in a pipeline, when there is a sudden change in velocity, due to the closing of valves. This is particularly important for plants based on complicated hydraulic circuits and piping, to avoid malfunctioning in the urban sewer network. In this study, the effect of a set of parameters: length, diameter and material of the pipe with and without surge tank on transient pressure is investigated by using the software HAMMER V8i. The results show that the maximum Transient Pressure is strongly influenced by an increase of 41.24% of the pipe diameter when the Surge Tank is not present. When the surge tank is inserted the transient pressure increases only of about 12.2%. So the surge tank can have a positive influence on the entire network. Moreover, the increase in the length will lead to a decrease in the Total Pressure of about 10% without Surge Tank and of 8.62% with Surge Tank. While the change in the roughness coefficient of the material used for the pipes will cause a decrease in the Total Pressure of about 42.6%, without Surge tank, and of 12.2% with Surge Tank.

水锤是由于阀门关闭而导致速度突然变化时在管道中产生的瞬态流动现象。对于基于复杂液压回路和管道的工厂而言，这尤其重要，以避免城市下水道网络出现故障。在这项研究中，使用软件HAMMER V8i研究了一组参数：长度，直径和带或不带调压罐的材料对瞬态压力的影响。结果表明，当不存在调压箱时，最大瞬态压力会受到管道直径增加41.24％的强烈影响。插入调压罐后，瞬态压力仅增加约12.2％。因此，调压罐可以对整个网络产生积极影响。此外，长度的增加将导致总压力的降低（不带调压箱）约为10％，带调压箱则下降8.62％。虽然用于管道的材料的粗糙度系数的变化将导致总压力下降（不带调压箱的情况下）约为42.6％，而带调压箱的情况下则为12.2％。