实验室上送下回空调气流组织的数值模拟

Numerical Simulation of Air Distribution of Up-supply and Down-return in Laboratory

采用标准k-ε双方程模型描述实验室内湍流流动,基于计算流体力学原理,应用Fortran语言为编程工具,就不同送风速度工况,对同侧上送下回通风方式下实验室的气流组织进行了数值研究,分析讨论了工作区域内舒适性空间所占体积分数,并应用衰减法对室内污染物的稀释排放进行了计算分析,得出该实验室同侧上送下回气流组织形态下,送风速度3.0 m/s工况为优化方案,同时对该工况下不同粒径颗粒物运动轨迹进行追踪计算,为实验室房间空调设计提供了理论指导。

The standard k-ε models were adopted, which were used to describe turbulent flow in laboratory. Based on computational fluid mechanics principle and applied Fortran language for programming tools, aiming at the different working condition of air supply, the air distribution of working area was researched in a laboratory under up-supply and down-return ventilation pattern, volume fraction of comfort zone in working area was analyzed and discussed. The dilution and emission of indoor pollutant was calculated and studied by using the step-down method, the optimum parameter of air supply velocity was 3.0m/s. Meanwhile, the trajectory of particles was also calculated and studied under the optimum parameter when the diameter of particles was different. The conclusion can provide theoretical basis for the design of air conditioning room.