基于营造及评价非均匀热环境目标的人体对流换热系数研究
Study on convective heat transfer coefficients for human body to create and evaluate non-uniform thermal environment
摘要：
为了精确评价非均匀热环境下人体热舒适性以营造低碳健康建筑环境，需要了解各方向气流下人体局部对流换热系数。本文基于实测实验及CFD模拟，对水平及竖直方向气流对人体局部对流换热系数的影响进行了研究，得到了人体各部位对流换热系数的计算模型，分析了各方向气流对人体对流换热系数的影响机制。结果显示：水平气流工况下的人体整体对流换热系数大于竖直气流工况；位于肢体末端的手部、小臂、脚部的对流换热系数较大；处于人体中心部位的腰腹部和背部的对流换热系数较小，且受不同方向气流影响较小。
Abstract：
To accurately evaluate the thermal comfort of the human body in a non-uniform thermal environment to create a low-carbon and healthy building environment, local convective heat transfer coefficients for the human body in various airflow directions are necessary. In this paper, based on the measured experiments and CFD simulation, the influences of horizontal and vertical airflow on the local convective heat transfer coefficients for the human body are studied, the calculation models of the convective heat transfer coefficients of different parts of the human body are derived, and the influence mechanism of airflow in each direction on the convective heat transfer coefficients for the human body is analysed. The results show that the overall convective heat transfer coefficient for the human body under the horizontal airflow condition is larger than that under the vertical airflow condition. The convective heat transfer coefficients for limbs (i.e., hands, arms, and feet) are larger. The convective heat transfer coefficients for the waist, abdomen and back in the central part of the human body are smaller and less affected by the airflow in different directions.
Keywords:convectiveheattransfercoefficient;humanbody;non-uniformthermalenvironment;thermalcomfort;airflowdirection;thermalmanikin;CFDsimulation