摘要
为探究空气罐在泵加压输水管线发生停泵水锤时,正、负压防护效果影响因子排序,寻求最优参数组合提高空气罐防护效果。基于新疆某输水工程,采用4因素4水平的正交试验方法,使用KYPIPE软件进行水力过渡过程模拟计算,建立正、负压防护效率评价指标对防护效果进行评价;采用熵权法将多目标优化转化为单目标优化,给出正、负压有效防护效率的权重分别为0.27、0.73。结果表明,对水锤防护效果影响最显著的因素为初始气体压力水头。各因素对正压防护效果影响大小排序为初始气体压力水头>入流阻力系数>出流阻力系数>高度直径比;对负压防护效果影响大小排序为初始气体压力水头>出流阻力系数>高度直径比>入流阻力系数;最优方案参数组合为初始气体压力水头为30 m、高度直径比为4、入流阻力系数为10、出流阻力系数为5;对比原方案,优化方案下最大正压降低15.8%,正压有效防护效率提高17.4%;最小负压增加60%,负压有效防护效率提高120%。
In order to explore the order of factors affecting the protective effect of positive pressure and negative pres-sure when the water hammer of air tank is stopped in the pump pressurized water transmission line,the optimal parame-ter combination is sought to improve the protective effect of air tank.Based on a water transmission project in Xinjiang,the orthogonal experiment method of 4 factors and 4 levels was used to simulate the hydraulic transition process with KYPIPE software,and the evaluation index of positive and negative pressure protection efficiency was established to eval-uate the protection effect.The entropy weight method was used to transform the multi-objective optimization into single objective optimization,and the weights of positive pressure effective protection efficiency and negative pressure effective protection efficiency are 0.27 and 0.73,respectively.The results show that the most significant factor affecting the pro-tective effect of water hammer is the initial gas pressure water head.The order of influence of each factor on the positive pressure protection effect is as follows:initial gas pressure water head>inflow resistance coefficient>outflow resist-ance coefficient>height diameter ratio;The order of influence on the negative pressure protection effect is as follows:initial gas pressure head>outflow resistance coefficient>height to diameter ratio>inflow resistance coefficient;The optimal scheme parameter combination is that the initial gas pressure water head is 30 m,the height to diameter ratio is 4,the inlet resistance coefficient is 10,and the outlet resistance coefficient is 5.Compared with the original scheme,the maximum positive pressure is reduced by 15.8%,and the effective protection efficiency of positive pressure is increased by 17.4%.The minimum negative pressure is increased by 60%,and the effective protection efficiency of negative pres-sure is increased by 120%.
作者
张猛强
牧振伟
周镇
张磊
曹伟
史修府
ZHANG Meng-qiang;MU Zhen-wei;ZHOU Zhen;ZHANG Lei;CAO Wei;SHI Xiu-fu(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Safety and Water Disaster Prevention,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《水电能源科学》
北大核心
2024年第11期140-144,共5页
Water Resources and Power
基金
新疆维吾尔自治区重大科技专项(2022A02003-4)。
关键词
泵加压输水管线
空气罐
水锤防护
正交试验
熵权法
参数优化
pump pressurized water pipeline
air tank
water hammer protection
orthogonal test
entropy weight method
parameter optimization
作者简介
张猛强(2000-),男,硕士研究生,研究方向为工程水力学,E-mail:15550505768@163.com;通讯作者:牧振伟(1973-),男,教授、博导,研究方向为水力学及河流动力学,E-mail:xjmzw@163.com。
