不同孔板送风室内流场及热舒适全尺度实验研究

Full Scale Measurements on the Airflow Patterns and Thermal Comfort of Ceiling Ventilation with Different Small Pores

本文通过建造辐射微孔板实验室研究了室内空气流场分布特征及人员热舒适状态。通过改变微孔板的位置和数量共得到五种不同送风工况,对比分析了室内热源、换气次数对不同送风工况下室内流场及人员热舒适度的影响。实验研究发现,热源的加入会影响室内平均流场和标准偏差,从而影响温度和速度分布的均匀性。耦合孔板送风室内各测点温度表现出不同于其他送风形式的规律。当加入热源后室内温度反而有降低趋势。此外,热源的加入对侧孔板送风室内各速度指标值影响很小。孔板送风室内人员不满意度最低,且增加室内热源可有效提高垂直孔板送风室内人员热舒适度。

The indoor airflow field distribution and thermal comfort under different ventilation schemes are studied in the laboratory of Hunan University of Technology.Five different ventilation schemes are conducted through changing the position and number of the micro-orifice plate.The effect of heat source and air change rate per hour on the airflow distribution and thermal comfort under different ventilation schemes.Results show that the heat source has an influence on the average indoor flow field and standard deviation.The temperature of measurement points under combined ventilation scheme is different from that under others,which has a decreasing trend when there is heat source in the test room.In addition,the addition of heat source has little effect on the velocity in the lateral ventilation scheme,and it can effectively improve the thermal comfort under the vertical ventilation scheme.