中文摘要：

针对层式通风空调系统,采用数值模拟方法研究了当换气次数和送风温度一定时,送风速度对室内流场、温度场和污染物CO2浓度分布的影响。研究结果表明：当设定换气次数为7次,送风温度为23℃,送风速度为0.44m/s左右时,室内热分层较好,且有利于污染物CO2的排除,室内空气质量良好。

英文摘要：

On account of the stratum ventilation, numerical simulation method is used to research the influence of supply air velocity on the indoor temperature fields, velocity fields and the CO2 concentration fields when the value of the ventilation rate and supply air temperature is determined. The results show that when the ventilation rate is 7 times, supply air temperature is 23 ℃, and the supply air velocity is 0.44 m/s, the indoor thermal stratification is better, and it Is conducive to the excluding of pollutants CO2, indoor air quality is good.