西北水电Issue(2)：86-93,8.DOI:10.3969/j.issn.1006-2610.2025.02.013
气垫式调压室特征参数对水电站引水系统水锤防护效果的影响研究
Study on the Influence of the Values of Characteristic Parameters of the Air Cushion Surge Chamber on the Water Hammer Protection Effect of the Water Diversion System of a Hydropower Station
摘要
Abstract
The air cushion surge chamber regulates the water hammer pressure fluctuations in the pipeline through the high-pressure air in the enclosed air chamber to reduce the damage of the water hammer pressure to the upstream water diversion tunnel.In order to analyze the water hammer protection effect of the air cushion surge chamber on the water diversion system of the power station under large fluctuation con-ditions,taking a hybrid development hydropower station as an example,by selecting different polytropic exponents of gas n and the initial wa-ter depth of the surge chamber,and considering factors such as the decrease of the gas control constant CT caused by the air leakage of the air cushion surge chamber,a systematic simulation study was carried out.The fluctuations of the water level and gas pressure in the surge cham-ber under the conditions of the accident load rejection and load increase of the hydropower unit were analyzed respectively.in the load rejec-tion scenario,the maximum air pressure and maximum water surface height from the one-dimensional simulation are less than those from the three-dimensional simulation,while the minimum air pressure and minimum water surface height from the one-dimensional simula-tion are greater than those from the three-dimensional simulation.The maximum difference in gas pressure between the three-dimen-sional simulation and the one-dimensional simulation results is 5.6％,and the maximum difference in the liquid level height is 3.9％.The change of the polytropic exponent of gas n has an impact on both the fluctuation period and peak value of the water level and pres-sure in the air chamber.The change of the initial water depth only affects the amplitude of the pressure fluctuation in the air chamber without affecting the fluctuation period.The maximum pressure change is only 2％under the load rejection condition,and the pressure hardly changes under the load increase condition.Reducing the gas control constant CT will significantly increase the liquid level height in the air chamber while the change range of the gas pressure is not large.The research results can provide a reference for the design and application of the air cushion surge chamber.关键词
气垫式调压室/水锤/大波动过渡过程/数值模拟Key words
Air Cushion Surge Chamber/Water Hammer/Large Fluctuation Transition Process/Numerical Simulation分类
建筑与水利引用本文复制引用
黄智鑫,张道法,闻锐,马新宇,荆海晓..气垫式调压室特征参数对水电站引水系统水锤防护效果的影响研究[J].西北水电,2025,(2):86-93,8.基金项目
国家自然科学基金项目(52079107) （52079107）
上海勘测设计研究院有限公司项目(2022SD(83)-002) （2022SD(83）
陕西省自然科学基础研究计划项目(2022JC-LHJJ-10) （2022JC-LHJJ-10）
