水电站无压尾水洞引风有效作用长度  

Effective Ventilating Length of Tailrace Tunnel in Hydropower Stations

作　　者：余延顺[1] 张少凡[1] 牛艳青[1] 赵永军[1] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094

出　　处：《南京理工大学学报》2009年第1期127-131,共5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：为研究无压尾水洞对引入空气的热湿处理能力,在尾水洞引风热湿交换过程简化模型基础上,建立了基于全热交换效率的引风有效作用长度计算模型,分析了尾水洞断面尺寸、引风入口参数、尾水温度、尾水及空气流速等因素对引风有效作用长度的影响,得出了无压尾水洞引风有效作用长度的变化规律。研究结果表明:尾水洞宽度、入口空气参数及尾水流速对引风有效作用长度的影响较大,而尾水温度对其影响较小。In order to study the cooling and dehumidifying capacity of the tailrace tunnel, a calculated model of effective length is established through the overall heat transfer efficiency of tailrace tun- nel based on the simplified model of heat and moisture transfer of tailrace tunnel ventilating. The in- fluences of section sizes of tunnels, inlet air parameters, water temperature and the velocities of water and air in tunnel on effective length are analyzed, and the variation of the effective length is concluded. The results show that the tunnel width, the inlet air parameters and the water velocity are the main influencing factors, while the influence of water temperature can be ignored.

关 键 词：有效作用长度 全热交换效率 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]