基于Bentley Hammer的泵站输水系统管道优化前后的水力过渡过程研究

Study on Hydraulic Transition Process Before and After Pipeline Optimization of Pumping Station Water Delivery System Based on Bentley Hammer

为了研究泵站输水系统管道优化前后事故停泵的水力过渡过程的特性,基于实际工程,运用Bentley Hammer软件,建立泵站输水系统双泵并联机组数学模型,研究两阶段不同关阀方案下管道优化前后对水锤压力、机组转速等最不利水锤参数的影响。结果表明,管道优化后最大水锤压力降低了3.76%~8.85%,最小水锤压力提升了4.89%~8.85%,最大倒转速度提高了1.47%~81.35%;快关时间对最不利水锤参数有显著影响,管道优化后泵站输水系统最不利水锤参数均比优化前提前发生。表明管道优化有效改善了泵站输水系统的水锤特性,提高了泵站输水系统的安全性。

In order to study the characteristics of the hydraulic transition process of accidental pump stoppage before and after the pipeline optimization of pumping station water delivery system,based on the actual project,Bentley Hammer software was used to establish a mathematical model of the pumping station water delivery system with two pumps in parallel units to study the effects of the most unfavorable water hammer parameters such as water hammer pressure and unit speed before and after the pipeline optimization under different two-stage valve shutdown schemes.The results show that the maximum water hammer pressure decreased by 3.76%-8.85%,the minimum water hammer pressure increased by 4.89%-8.85%,and the maximum reversal speed increased by 1.47%-81.35%after pipeline optimization;The fast shutdown time had a significant effect on the most unfavorable water hammer parameters,and the most unfavorable water hammer parameters of the pumping station water delivery system all occurred before than before the optimization after pipeline optimization.It shows that the pipeline optimization effectively improved the water hammer characteristics and the safety of the pumping station water delivery system.