Abstract:Considering the problem of vertical air vessel safety, large installation space and the limitations of the topographic condition and plant size, a new installation type of air vessel, called the horizontal air vessel, is introduced as an alternative scheme. Based on the method of characteristic, the boundary condition mathematical model of horizontal air vessel is built and the numerical calculation formula of pressure and water level in the vessel is deduced. According to the fluid transients numerical simulation of the vertical and horizontal air vessels under pump-stopping, the results show that both the vertical and horizontal air vessels can effectively protect the pump-stopping water hammer; with the same shape parameters, the variation of water level in the horizontal air vessel is smaller than that in the vertical vessel, and the horizontal air vessel has a relatively better protective properties for water hammer than the vertical air vessel. As for a given volume horizontal air vessel, there is a best restric-ted orifice for water hammer protection. Under the prerequisite that the water of the air vessel supplied to the pipeline is enough, increasing the initial gas volume and installation elevation of horizontal air vessel will make the protective effects on water hammer better.
何城, 张健, 郑源, 王焰康, 何东阳. 卧式空气罐的水锤防护性能[J]. 排灌机械工程学报, 2017, 35(2): 138-143.
HE Cheng, ZHANG Jian, ZHENG Yuan, WANG Yankang, HE Dongyang. Protective properties of horizontal air vessel for water hammer. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(2): 138-143.
[1]CHAUDHRY M H. Applied hydraulic transients[M]. 3rd ed. New York, USA:Springer,2013.[2]张健,俞晓东,朱永忠. 长距离供水工程的关阀水锤与线路充填[J]. 水力发电学报,2010,29(2):183-189. ZHANG Jian, YU Xiaodong, ZHU Yongzhong. Study on water-hammer and line packing in long-distance water-supply project[J]. Journal of hydroelectric engineering,2010,29(2):183-189.(in Chinese)[3]邓安利,蒋劲,兰刚,等. 长距离输水工程停泵水锤的空气罐防护特性[J]. 武汉大学学报(工学版),2015,48(3):402-406. DENG Anli,JIANG Jin,LAN Gang, et al. Research on protective properties of air vessel for pump-stopping water hammer protection of long distance pipelines[J]. Engineering journal of Wuhan University,2015,48(3):402-406.(in Chinese)[4]于永海,王金星,秦晓峰. 空气罐水锤防护的并联泵系统水力振动分析[J]. 排灌机械工程学报,2013,31(11):958-963. YU Yonghai,WANG Jinxing,QIN Xiaofeng. Hydraulic vibration analysis of parallel pump system with air surge tank for water hammer protection[J]. Journal of drai-nage and irrigation machinery engineering[J]. 2013,31(11):958-963.(in Chinese)[5]STEPHENSON D. Simple guide for design of air vessels for water hammer protection of pumping lines[J]. Journal of hydraulic engineering, 2002,128(8):792-797.[6]黄玉毅,李建刚,符向前,等.长距离输水工程停泵水锤的空气罐与气阀防护比较研究[J].中国农村水利水电,2014(8):186-188,192. HUANG Yuyi,LI Jiangang, FU Xiangqian, et al. Research on the comparison of air vessel and air valve on pump-stopping water hammer protection of long-distance pipelines[J]. China rural water and hydropower,2014(8):186-188,192.(in Chinese) [7]梁兴,刘梅清,张进国,等. 空气罐对输水管道水锤的防护研究[J].排灌机械,2005,23(6):16-18. LIANG Xing,LIU Meiqing,ZHANG Jinguo, et al. Protection study on water hammer of pipelines by air vessel[J]. Drainage and irrigation machinery,2005,23(6):16-18.(in Chinese)[8]张健,苗帝,黎东洲, 等. 长距离供水工程空气罐水锤防护方案研究[C]//第二十七届全国水动力学研讨会文集(下册). 南京:河海大学水利水电学院,2015, 1228-1237.[9]龚娟,张健,俞晓东.高扬程输水系统空气罐阻抗孔尺寸优化[J].水电能源科学,2013,31(5):166-169. GONG Juan,ZHANG Jian,YU Xiaodong. Optimization of impedance orifice of air vessel in high-lift water supply system[J]. Water resources and power,2013,31(5):166-169.(in Chinese)[10]杨立信. 国外调水工程[M]. 北京:中国水利水电出版社,2003.[11]WYLIE E B, STREETER V L, SUO Lisheng. Fluid transient in systems[M]. Englewood Cliffs, NJ, USA: Prentice Hall, 1993:61-65.[12]杨开林. 电站与泵站中的水力瞬变及调节[M]. 北京:中国水利水电出版社,2000.