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Experimental and numerical investigation of the Reynolds number effect on indoor airflow characteristics

机译：室内气流特性雷诺数效应的实验和数值研究

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摘要

Nowadays, thermal comfort in an indoor environment is one of the most important aspects related to the general comfort encountered in human life. In this framework, numerous studies have been done in the aim to evaluate the parameters that affect the indoor thermal comfort. This paper focuses on a numerical investigation of Reynolds number (Re) effect on the airflow characteristics and the discomfort due to the draft for a ventilated cabin prototype. A series of numerical simulations were performed using the software ANSYS FLUENT 17.0. As observed in the numerical results, the Reynolds number has a major impact on the velocity fields, the static pressure and the turbulence characteristics. Hence, robust correlations between the velocity, the turbulence characteristics and the Reynolds number were presented. Furthermore, the numerical results highlighted that the Reynolds number has a direct impact on the discomfort due to the draft. In the median plane, the maximum value of predicted Percent Dissatisfied due to the draft (PD %) for Re = 6666 decreased by 2.7, 2.07 and 1.58 times the values reached by Re = 26666, Re = 20000 and Re = 13333 respectively. Accordingly, this paper presents the behaviour of airflow in the indoor environment that it will be useful in buildings design.
机译：如今，室内环境中的热舒适性是与人类生活中遇到的众所周知的最重要方面之一。在这一框架中，旨在评估影响室内热舒适度的参数。本文侧重于雷诺数（RE）对气流特性和通风舱原型引起的不适的数值调查。使用软件ANSYS流畅的17.0进行一系列数值模拟。如在数值结果中所观察到的，雷诺数对速度场具有重大影响，静压和湍流特性。因此，提出了速度，湍流特性和雷诺数之间的鲁棒相关性。此外，数值结果突出显示，雷诺数因草案而对不适产生直接影响。在中间平面中，由于RE = 6666的草稿（Pd％）因Re = 26666，Re = 20000和Re = 13333而达到的值的预测百分比不满意的预测百分比不满意的最大值。因此，本文介绍了在室内环境中的气流行为，即在建筑物设计中有用。

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  • 来源
    《Advances in building energy research》 |2020年第4期|424-449|共26页
  • 作者

    Hasna Abid; Ismail Baklouti; Zied Driss; Jamel Bessrour;

  • 作者单位

    Laboratory of Electro-Mechanic Systems (LASEM) National School of Engineers of Sfax (ENIS) University of Sfax Sfax Tunisia National School of Engineers of Tunis (ENIT) University of Tunis Manar Tunis Tunisia;

    Laboratory of Electro-Mechanic Systems (LASEM) National School of Engineers of Sfax (ENIS) University of Sfax Sfax Tunisia National School of Engineers of Monastir (ENIM) University of Monastir Monastir Tunisia;

    Laboratory of Electro-Mechanic Systems (LASEM) National School of Engineers of Sfax (ENIS) University of Sfax Sfax Tunisia;

    National School of Engineers of Tunis (ENIT) University of Tunis Manar Tunis Tunisia;

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  • 正文语种 eng
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  • 关键词

    Indoor environment; CFD; cabin prototype; comfort index; Reynolds number; discomfort due to draft;

    机译：室内环境;CFD;驾驶室原型;舒适指数;雷诺数;草案引起的不适;

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