摘要
以S1210型翼型为基础,设计了一种基于科恩达效应的捕风器,采用数值模拟的方法,在自然风速为3 m/s的情况下,对一尺寸为30 m×20 m×3.5 m的地下仓库实际通风效果进行了研究。研究结果表明:在不同捕风器高度下,室内通风换气次数均在1次以上,且随着捕风器高度提升,风管进出口的速度值不断增大、负压值不断减小,进出口压力差最大为1.3 Pa;翼型壁面上形成的负压区最下负压值为-14 Pa,随着捕风器高度的提升,通风量也随之增大,但由于同时增大了圆管内的摩擦阻力,通风量的增长速率不断减小;增加捕风器高度对增大通风量有作用且随高度增加作用不断减小;自然风速为1 m/s~5 m/s的工况下,当自然风速大于等于3 m/s时,采用两个翼型捕风器的地下空间通风换气次数可达到1.5次/h以上。
Based on the S1210 airfoil,a wind catcher based on the Coenda effect was designed,and the actual ventilation effect of an underground space with a size of 30 m×20 m×3.5 m was studied under the condition of natural wind speed of 3 m/s,and the results showed that the number of indoor ventilation was more than 1 time under different trap heights,and with the increase of the height of the trap,the velocity value of the air duct inlet and outlet increased and the negative pressure value decreased.The maximum pressure difference between the inlet and outlet is 1.3 Pa,the lowest negative pressure value of the negative pressure area formed on the airfoil wall is-14 Pa,and the ventilation volume increases with the increase of the height of the wind catcher,but the growth rate of the ventilation volume decreases continuously due to the increase of friction resistance in the round pipe at the same time.Increasing the height of the wind catcher has an effect on increasing the ventilation capacity,and the effect decreases with the increase of the height.The working condition with the natural wind speed of 1 m/s~5 m/s is studied,and the results show that when the natural wind speed is more than 3 m/s,the ventilation rate of underground space with two airfoils can reach 1.5 times/h.
作者
向昕
彭小勇
刘佳勇
叶美宏
XIANG Xin;PENG Xiaoyong;LIU Jiayong;YE Meihong(School of Civil Engineering,University of South China,Hengyang,Hunan 421001,China)
出处
《南华大学学报（自然科学版）》
2024年第3期7-14,共8页
Journal of University of South China：Science and Technology
基金
国家自然科学基金项目(230XJZ105)。
关键词
自然通风
捕风器
科恩达效应
数值模拟
natural ventilation
wind catchers
the Coenda Effect
numerical simulation
作者简介
向昕(1999-),男,硕士研究生,主要从事空气环境及其计算机仿真方面的研究。E-mail:xiangxinusc@163.com;通信作者:彭小勇(1961-),男,教授,博士,主要从事空气环境及其计算机仿真、建筑风环境、HVAC设备与系统性能等方面的研究。E-mail:pengxiaoyong@126.com。
