摘要
针对现有车室热舒适性的评价很少考虑空气相对湿度的问题,以某轿车车室为研究对象,采用数值计算方法,以PMV-PPD值为评价指标,在夏季极端工况下综合考虑温湿度变化对热舒适性的影响,计算出车内PMV-PPD值分布规律,并通过UDF编程将评价指标进行可视化处理。结果表明,车室内部流场相对稳定,除部分区域的热舒适性不能令人满意外,整体处在相对舒适的状态。在温度为定值时,相对湿度对人体热感觉有一定影响,并且车内温度越高,相对湿度对热舒适性的影响越明显。因此在夏季高温条件下车室内温度不能降低时,可通过减小相对湿度提高热舒适性。
To address the problem that the relative humidity is rarely taken into account in thermal comfort evaluation of ear compartment, this paper takes a car compartment as the research object, using numerical simulation approach with the PMV-PPD evaluation index, considering the influence of temperature and humidity in thermal comfort evaluation. A numerical simulation is conducted to get the distribution of PMV-PPD inside the vehicle compartment under the summer extreme operating conditions. The thermal comfort evaluation in different positions of the vehicle compartment is visualized by programming. The results show that the flow field inside the ear compartment is relatively stable and the thermal environment is relatively in comfortable state except of the regional part ; When the tempera- ture is constant, the relative humidity has influence on thermal comfort. And the higher the temperature inside the car compartment, the more obvious influence of relative humidity on human＇ s thermal sensation. Therefore, when the temperature of the vehicle compartment cannot be decreased under the condition of high temperature in summer, thermal comfort can be improved by reducing the relative humidity.
出处
《计算机仿真》
CSCD
北大核心
2016年第9期163-168,共6页
Computer Simulation
基金
中央财政支持地方高校专项资金项目-创新团队(0420036017)
湖南大学汽车车身先进设计与制造国家重点实验室自主课题资助项目(734215002)
关键词
轿车车室
热舒适性指标
相对湿度
热舒适性
数值仿真
Car compartment
PMV-PPD index
Relative humidity
Thermal comfort
Numerical simulation
