摘要
通过实验测试和CFD模拟,研究了地板静压层内有一根横梁时,静压层内的气流流动特性及局部阻力系数的理论计算式。研究结果表明,横梁高与静压层高之比为0.3～0.7,静压层内速度为0.2～1.0m/s,Re为4.08×103～2.04×104时,局部阻力的理论计算值与实测值非常接近,该理论计算式可用于计算局部阻力系数。
Based on the experiments and CFD simulation, studies the airflow characteristics in underfloor plenum and deduces the calculation formula of the local resistance coefficient when there is one beam crossed to the airflow direction in underfloor plenum. As a result, the calculation values of local resistance agrees well with experimental ones under the condition of the ratio of beam height to plenum height in the range of 0.3 - 0.7, air velocity in underfloor plenum 0.2 - 1.0 metre per second and Reynolds number 4 080 - 20 400, and the formula can be applied to calculate local resistance coefficient.
出处
《暖通空调》
北大核心
2008年第11期121-124,共4页
Heating Ventilating & Air Conditioning
基金
教育部博士点专项基金项目(编号:20050532022)
关键词
静压层
局部阻力系数
流动特性
underfloor plenum, local resistance coefficient, flow characteristic
