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Evaluation of various categories of turbulence models for predicting air distribution in an airliner cabin

机译：评估各种湍流模型以预测客机内的空气分布

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摘要

Flow fields in commercial airliner cabins are crucial for creating a thermally comfortable and healthy cabin environment. The study of flow fields in cabins could be achieved by numerically solving Navier-Stokes equations with a suitable turbulence model. This investigation evaluated three turbulence models in different categories: the RNG k-ε model, LES, and DES for the steady-state flow in the first-class cabin of a functional MD-82 commercial airliner. The measured flow fields under unoccupied and fully-occupied conditions in the first-class cabin were used for validating the turbulence models. The flow in the unoccupied cabin was isothermally forced convection created by air jets from the diffusers, while the flow in the fully-occupied cabin was mixed convection driven by both the jets and thermal plumes from the thermal manikins used to simulate passengers. This study found that the RNG k-e model gave acceptable accuracy in predicting the airflow in the unoccupied cabin where the flow was simple, but not for the complicated flow in the fully-occupied cabin. The DES gave acceptable flow fields for both cabins. The LES performed the best and the results agreed well with the experimental data. Comparing the measured flow fields in the two cabin conditions, this study found that the thermal plumes from the heated manikins had a significant influence on the flow fields, but little influence on the turbulence.
机译：商业客机机舱内的流场对于创造热舒适且健康的机舱环境至关重要。可以通过用合适的湍流模型对Navier-Stokes方程进行数值求解来研究机舱内的流场。这项研究评估了三种不同类别的湍流模型：RNGk-ε模型，LES和DES，用于一架功能性MD-82商用客机的头等舱内的稳态流动。在头等舱中，在无人和满员情况下测得的流场用于验证湍流模型。空客舱中的气流是由扩散器的气流产生的等温强制对流，而空客舱中的气流是由喷射流和用于模拟乘客的热人体模型的热羽驱动的混合对流。这项研究发现，RNG k-e模型在预测气流很简单的无人驾驶室中的气流方面给出了可接受的准确性，但对于满员的机舱中的复杂气流却没有给出预测。 DES给出了两个舱室可接受的流场。 LES表现最好，结果与实验数据吻合良好。通过比较在两个机舱条件下测得的流场，这项研究发现，加热的人体模型产生的热羽流对流场有显着影响，而对湍流影响很小。

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  • 来源
    《Building and Environment》 |2013年第7期|118-131|共14页
  • 作者

    Wei Liu; Jizhou Wen; Chao-Hsin Lin; Junjie Liu; Zhengwei Long; Qingyan Chen;

  • 作者单位

    School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China ,School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;

    School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;

    Environmental Control Systems, Boeing Commercial Airplanes, Everett, WA 98203, USA;

    School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China ,School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Airliner cabin; Flow field; Turbulence model; CFD simulation; Validation;

    机译：客机舱流场湍流模型CFD模拟;验证方式;

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