穿孔幕墙的通风附加阻力特性研究
Ventilation additional resistance characteristics of perforated curtain wall
摘要：
采用模型试验和数值计算相结合的方法，研究了穿孔幕墙遮挡风口引起的通风系统附加阻力特性，分析了附加阻力系数的变化规律。结果表明：穿孔幕墙附加阻力系数与管内风速和幕墙孔径基本无关，随安装距离的增大呈指数形式减小；在穿孔率为20%～50%、安装距离为100～1 000 mm时，附加阻力系数与安装距离的关系可表示为Δζ=Aexp(BL)。
Abstract：
Studies the additional resistance characteristics of ventilation system caused by perforated curtain wall using the method combining model experiment with numerical calculation, and analyses the variation rule of additional resistance coefficient. The results show that the additional resistance coefficient decreases exponentially with the increase of installation distance, and the wind speed in the pipe and the size of perforation are independent. When the perforation rate is 20% to 50% and the installation distance is 100 to 1 000 mm, the relationship between additional resistance coefficient and installation distance can be expressed as Δζ=Aexp(BL).
Keywords:perforated curtain wall, additional resistance coefficient, installation distance, perforation rate, model experiment, numerical calculation