考虑人体热调节的乘员表面温度分布及车内热环境的数值仿真和实验
首发时间:2019-11-06
摘要:研究人体表面温度分布情况及乘员舱热环境对乘员热舒适性评价有重要的指导意义。以冬季乘员舱内热环境为研究对象,对车内热流场动态变化过程进行了测试,建立了乘员舱瞬态仿真模型,仿真计算结果与实验测试结果吻合良好。研究结果表明,暖风系统开启后,车内气温在高度方向和前后排乘坐空间存在明显不均匀性,后排热环境均匀性优于前排热环境。随后基于人体热调节模型得到了乘员皮肤温度变化过程。分析表明,人体散热对乘员舱温度分布的影响可以忽略。乘员皮肤温度均有不同程度的上升,不同乘坐位置下乘员各身体部位皮肤温度变化存在差异。
关键词: 车辆工程 乘员舱热环境 人体皮肤温度 热舒适性 实验测试 数值模拟
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Numerical simulation and experiment of occupant's surface temperature distribution and thermal environment based on human thermal regulation model
Abstract:The distribution of the human body temperature and thermal environment in vehicle cabin are of great significance to the evaluation of thermal comfort of passengers. Focusing on the thermal environment within a vehicle in winter, the transition thermal environment parameters inside cabin under the effect of heating, ventilation and air conditioning(HVAC) system is measured, the transient simulation model of the passenger compartment is established. The simulation results are in good agreement with the experimental results. The results show that when the air conditioning is turned on, the air temperature inside the vehicle is of highly non-uniform distribution along the height direction and the front cabin is cooler than the rear cabin. The thermal environment uniformity in the rear cabin is better than that in the front cabin. Based on the thermal regulation model of human body, the change process of skin temperature of passengers is obtained. It can be found that the influence of human body heat dissipationon the temperature distribution of cabin can be ignored. The skin temperature on different parts of occupants at different seating positions increases and changes differently.
Keywords: Vehicle engineering Thermal environment Human skin temperature Thermal comfort Experiment Numerical simulation
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考虑人体热调节的乘员表面温度分布及车内热环境的数值仿真和实验
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