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Experimental study of the interaction between thermal plumes and human breathing in an undisturbed indoor environment

机译：不受干扰室内环境中热羽毛与人类呼吸相互作用的实验研究

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摘要

This study characterized the interaction between human thermal plume and breathing air flow while people are sitting in a quiescent indoor environment. A sitting breathing thermal manikin was developed to mimic a real human, and data from real human subjects was collected to verify the breathing thermal manikin. In this study the velocity and temperature were measured in front of and above the breathing thermal manikin with and without breathing. In addition, the breathing modes through mouth and nose were studied to investigate the influence of breathing mode on the development of thermal plume, respectively. The ambient temperature was set at 23 +/- 0.5 degrees C, and the surface temperature of manikin varied between 33-34 degrees C. Without breathing, a maximum value of 0.19 m/s was reached at around 35 cm height above the head which was similar with the mouth-breathing case (0.19 m/s) and higher than the nose breathing case (0.17 m/s). However, the two breathing mode would mitigate the thermal gradient and lower the maximum velocity and had little influence on the height of maximum velocity. Above the manikin's head, non-breathing thermal manikin can produce very similar velocity distribution compared to the breathing modes. But the velocity above the head in the non-breathing case reported the highest maximum value and developed faster to reach the maximum velocity. Breathing through the nose had much more impact on thermal plumes around manikin than breathing through the mouth, even change the flow direction. (C) 2019 Elsevier B.V. All rights reserved.
机译：本研究表征了人类热羽流与呼吸空气流动之间的相互作用，而人们坐在静态环境中。坐着呼吸的热人体模拟被开发用于模仿真正的人类，收集来自真实人类受试者的数据以验证呼吸的热人体。在这项研究中，在呼吸的热人体内皮的前方和没有呼吸的情况下测量速度和温度。此外，研究了呼吸模式通过口腔和鼻子分别研究了呼吸模式对热羽流发展的影响。环境温度设定为23 +/- 0.5℃，人体模型的表面温度在33-34摄氏度之间变化。没有呼吸，最大值为0.19米/ s，在头部上方约35厘米的高度达到约35厘米与口腔呼吸箱（0.19米/秒）和高于鼻子呼吸箱（0.17米/秒）相似。然而，两种呼吸模式将减轻热梯度并降低最大速度，并且对最大速度的高度影响很小。在Manikin的头部之上，与呼吸模式相比，无呼吸的热人体可以产生非常相似的速度分布。但是，在非呼吸案件中的头部上方的速度报告了最高值，并且更快地发展到达到最大速度。通过鼻子呼吸对Manikin周围的热羽毛的呼吸产生更多的影响，而不是通过嘴呼吸，甚至会改变流动方向。 （c）2019 Elsevier B.v.保留所有权利。

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  • 来源
    《Energy and Buildings》 |2020年第1期|109587.1-109587.16|共16页
  • 作者

    Zhu Cheng; Cao Guangyu; Aganovic Amar; Li Baizhan;

  • 作者单位

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Peoples R China;

    Norwegian Univ Sci & Technol NTNU Dept Energy & Proc Engn Kolbjorn Hejes Vei 1B NO-7491 Trondheim Norway;

    Chongqing Univ Minist Educ Joint Int Res Lab Green Bldg & Built Environm Chongqing 400045 Peoples R China;

    Chongqing Univ Minist Educ Joint Int Res Lab Green Bldg & Built Environm Chongqing 400045 Peoples R China|Chongqing Univ Minist Sci & Technol Natl Ctr Int Res Low Carbon & Green Bldg Chongqing 400045 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Thermal plume; Breathing thermal manikin; Real human; Sitting posture;

    机译：热羽毛;呼吸热人体;真正的人类;坐姿姿势;

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