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首页> 外文期刊>Journal of visualization >PIV methods for quantifying human thermal plumes in a cabin environment without ventilation
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PIV methods for quantifying human thermal plumes in a cabin environment without ventilation

机译：PIV方法在无需通风的情况下对机舱环境中的人为热羽定量

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摘要

The role that thermal plumes play becomes more crucial, especially in a densely occupied space, such as an aircraft cabin. In this paper, the aim is to isolate this effect and to investigate the air distribution of individual human thermal plumes in the cabin. For this purpose, the thermal plume conditions in the aircraft cabin have been developed without any ventilation. The experimental procedure to quantify the air distribution of thermal plumes with both high temporal and spatial resolution was built with two different types of 2D particle image velocimetry (PIV) systems, and the reliability and repeatability of the measured data were verified. With such reliable data, the numerical models can be validated and improved in the future. In addition, certain phenomena were revealed in this research. From the time-averaged velocity fields, the thermal plumes were greatly influenced by the particular aircraft cabin geometry and restricted by the relatively small space and the maximum speed presented behind the manikin’s head. Through a time series analysis of instantaneous air distributions, the thermal plumes appeared one after another with a period of approximately 5 s, and the multi-scale characteristics of both time and intensity were observed by monitoring the instantaneous velocity of a typical point.
机译：热羽流扮演的角色变得更加关键，尤其是在机舱等密集的空间中。在本文中，目的是隔离这种影响并研究客舱中单个人为热羽的空气分布。为此，已经开发出机舱中的热羽流条件而没有任何通风。利用两种不同类型的2D粒子图像测速（PIV）系统建立了量化高时间和空间分辨率的热羽流空气分布的实验程序，并验证了测量数据的可靠性和可重复性。有了这种可靠的数据，数值模型可以在将来得到验证和改进。此外，这项研究还揭示了某些现象。从时间平均速度场来看，热羽流受到飞机机舱特殊几何形状的极大影响，并受到人体模型头部后面相对较小的空间和最大速度的限制。通过瞬时空气分布的时间序列分析，大约在5 s的时间内，热羽逐次出现，并且通过监测典型点的瞬时速度来观察时间和强度的多尺度特征。

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  • 来源
    《Journal of visualization》 |2017年第3期|535-548|共14页
  • 作者

    Li Jiayu; Liu Junjie; Wang Congcong; Jiang Nan; Cao Xiaodong;

  • 作者单位

    Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China;

    Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China;

    Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China;

    School of Mechanical Engineering, Tianjin University, Tianjin, China,Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin, China;

    Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Air distribution; Cabin environment; PIV; Thermal plumes;

    机译：空气分配;机舱环境;PIV;热羽;

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