水电站无压尾水洞引风过程的热湿交换特性  

Characteristics of Heat and Moisture Transfer of Tailrace Tunnel Ventilation in Hydropower Station

作　　者：余延顺[1] 李先庭[2] 石文星[2] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094 [2]清华大学建筑技术科学系,北京100084

出　　处：《南京理工大学学报》2009年第5期600-606,共7页Journal of Nanjing University of Science and Technology

基　　金：江苏省自然科学基金创新人才启动项目(BK2007595);南京理工大学科研发展基金(XKF07007)

摘　　要：在无压尾水洞引风过程的准三维数学模型基础上，对在不同岩层热参数、引风风速及尾水温度条件下的全年引风特性进行了模拟计算，分析了各因素对无压尾水洞引风热湿交换特性的影响。结果表明：在无压尾水洞引风过程中，空气与尾水表面的热湿交换占主导作用，其热湿交换量占总量的80％～90％，洞体岩层的长期热累积效应对引风特性的影响很小；引风参数沿流动方向近似以指数规律逐渐接近对应尾水温度的饱和状态，且空气参数变化周期为1年。Based on the quasi-three-dimensional mathematical model of the tailrace tunnel ventilation, the annual ventilating characteristics with different ground thermal parameters, wind speed and water temperature are simulated, and the effects of the factors on the heat and moisture transfer characteristics of the tailrace tunnel ventilation are analyzed. The results show that the effect of long-term thermal accumulation of the tunnel on ventilation characteristics can he ignored, the heat and moisture transfer between air and water surface is dominant and the transfer amount reaches 80% - 90% of the total. Moreover, the air parameters are gradually close to the saturation condition of the corresponding water temperature with approximate index function along its flowing direction, and the cycle of air parameter change is one year.

关 键 词：热湿交换 准三维模型 无压尾水洞 引风 水电站 

分 类 号：TU271.1[建筑科学—建筑设计及理论]