水资源与水工程学报2017，Vol.28Issue(1)：125-129,5.DOI:10.11705/j.issn.1672-643X.2017.01.22
调压室位置和面积变化对尾水管压力的影响研究
Influences of the changes from surge chamber location and area on draft tube pressure
摘要
Abstract
In order to study the influences of the location and area of the tailrace surge chamber on the draft tube pressure,with the common hydropower transition process software,a model was established and used for numerical calculation and analysis,combined with an engineering example of restricted orifice tailrace surge chamber.The process considered the hydro-turbine characteristics,the boundary conditions,the closing law of guide vane and the effects of elastic water hammer.The results showed that,it was not true thatthe closer the distance between tailrace surge chamber and hydropower house,the more beneficial to the pressure value of the draft tube.There was a critical position of the draft tube minimum pressure value,the changes of surge chamber area also greatly affected the minimum pressure value of draft tube.When the tailrace surge chamber exceeded the critical position and moved towards the direction of the hydropower house,the change in the minimum pressure of draft tube was small,which did not improve the minimum pressure of the draft tube significantly.However,when the area of surge chamber increased,it obviously changed the minimum pressure in draft tube.This conclusion is beneficial to the arrangements of the surge chamber and underground hydropower house,and it also alleviates the contradiction between the stability of surrounding rocks and the safety in hydraulic transition process.关键词
尾水调压室/弹性水锤/尾水管压力/调压室面积/最佳临界位置Key words
tailrace surge chamber/elastic water hammer/pressure in draft tube/area of surge chamber/optimum critical location分类
建筑与水利引用本文复制引用
占小涛,张晓宏,张俊发..调压室位置和面积变化对尾水管压力的影响研究[J].水资源与水工程学报,2017,28(1):125-129,5.基金项目
国家自然科学基金项目(51279162) （51279162）
