工程科学与技术2017，Vol.49Issue(3)：29-36,8.DOI:10.15961/j.jsuese.201600415
水电站调压室施工通风数值模拟与检测反馈研究
Numerical Simulation and Detection Feedback of Ventilation in the Surge-chamber of a Hydropower Station
摘要
Abstract
The ventilation effect has a direct influence on the efficiency and security of the construction of underground cavern group.Based on the surge-chamber project of Huangjinping hydropower station,the ventilation plan was dynamically adjusted by the results of numerical simulation and field test.The ventilation flow field simulated by FLUENT showed that the wind speed under the initial ventilation scheme can generally meet the requirements of the specification,while in some corners it was lower than 0.25 m/s.Thus some negative pressure blowers and jet fans have been added at the intersection of the caverns and it is recommended to block the completed upper-construction adit that does not need ventilation.From the measured data,the above measures have achieved the objectives,i.e.,the wind speed in the corner of the chamber has increased significantly,meeting the standard requirement.The on-site test of ventilation showed that the wind speed of the cavern group has a certain increase after the optimization of the initial ventilation scheme.It is found that the wind speed had a negative correlation with dust concentration and temperature.From the trend of changing wind along the cavern,the temperature essentially exceeded the standard of 28 ℃ and the dust concentration significantly outpaced the national standard of 10 mg/m3 when the wind speed was lower than 0.5 m/s in the whole or some sections of the cavern group.Therefore,in order to ensure the quality of ventilation,it was suggested that the wind speed in the underground cavern group during the excavation process should be no less than 0.5 m/s.From the measured data,it can be found that the ventilation environment was complex and the ventilation flow field at the intersection of the caverns was very unstable.Therefore,it was suggested that the similar project should be provided with real-time detection points of airflow elements whenever necessary,and the ventilation scheme should be dynamically optimized according to the field test results to ensure the ventilation quality in all time.关键词
地下洞室群/调压室/施工通风/数值模拟/现场检测Key words
underground cavern group/surge-chamber/construction ventilation/numerical simulation/field test分类
建筑与水利引用本文复制引用
华天波,王勇胜,姚强,杨兴国,李洪涛..水电站调压室施工通风数值模拟与检测反馈研究[J].工程科学与技术,2017,49(3):29-36,8.基金项目
国家科技支撑计划资助项目(2014BAB03B04) （2014BAB03B04）
四川大学青年教师科研启动基金资助项目(2016SCU11039) （2016SCU11039）
