圆管型与廊道型气垫式调压室水力性能比较  

Comparison of hydraulic performance of round pipe-shaped and corridor-shaped air-cushioned surge tank

作　　者：刘德有[1] 张罗彬[2] 陈五一[2] 王丰[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《河海大学学报（自然科学版）》2012年第5期534-538,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(50979029)

摘　　要：针对廊道型气垫式调压室的罩式闭气结构比较复杂而且施工难度较大的特点,提出采用水平圆钢管型洞室代替常用的长廊道型洞室的新型气垫式调压室方案。以四川某水电站气垫式调压室为例,经大波动过渡过程计算和小波动稳定性分析,比较2种不同体型气垫式调压室的水力性能和运行稳定性。结果表明:在洞室横断面面积相等的情况下,圆管型气垫式调压室的小波动稳定性较好;调压室内水位波动幅值较小、最大气体压力和机组蜗壳进口最大压力较小,其大波动水力性能也相对较好。Considering the complexity and construction difficulty of the anti-leakage structure of a corridor-shaped air-cushioned surge tank,a new type of air-cushioned surge tank,here called the round pipe-shaped surge tank,is introduced as an alternative in this paper.Taking an air-cushioned surge tank at a hydropower station in Sichuan Province as an example,the differences in the hydraulic performance and operating stability between the two design schemes based on the transient process simulation and stability analysis were explored.The results show that as the cross-sectional area of the tanks was the same,the round pipe-shaped surge tank had better stability with small fluctuation.Meanwhile,the amplitude value of the water level in the tank was smaller,the maximum gas pressure and maximum water pressure in the spiral case inlet were relatively smaller,and,thus,the round pipe-shaped surge tank had a relatively better hydraulic performance.

关 键 词：气垫式调压室 水力性能 气体渗漏 圆管型调压室 廊道型调压室 

分 类 号：TV732.56[水利工程—水利水电工程]