Comparison on Hydraulic Characteristics of Vertical and Horizontal Air-Cushion Surge Chambers in the Hydropower Station under Load Disturbances

被引：1

作者：

Xu, Tingyu ^{[1
]}

Chen, Sheng ^{[1
]}

Zhang, Jian ^{[1
]}

Yu, Xiaodong ^{[1
]}

Lyu, Jiawen ^{[1
]}

Yan, Haibin ^{[2
]}

机构：

[1] Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Peoples R China

[2] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 1H9, Canada

来源：

ENERGIES | 2023年 / 16卷 / 03期

基金：

中国国家自然科学基金;

关键词：

air-cushion surge chamber; flow regime; load disturbances; pressure variation; surge fluctuation; PRESSURE SURGE; PROTECTION; VESSELS;

D O I：

10.3390/en16031501

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Hydroelectric energy is an increasingly vital and effective renewable energy for modern society. The protective effect on the water hammer in the pipeline, the operational stability of the hydropower system, and the flow regime in the air-cushion surge chamber (ACSC) are three main problems during the design of the hydropower station with an ACSC. Comprehensively comparing the above issues between the horizontal and vertical ACSCs is meaningful. This study established the one-dimensional (1D) model based on the Method of Characteristics (MOC) under large load disturbances (LLD) and the rigid water column theory under small load disturbances (SLD). At the same time, the three-dimensional (3D) model was built based on the Volume of Fluid (VOF) to obtain a more detailed flow regime in the ACSC under the load acceptance condition. The results showed that the vertical ACSC was superior to the horizontal one for its large safe water depth, smaller maximum air pressure, and more stable flow under LLD. In contrast, the horizontal one was better than the vertical one for its extensive water area to calm the SLD during the transient process and smaller fluctuation of the surge under SLD. This study will provide a reference for a future project on selecting the structure of the ACSC.

引用

页数：15