Numerical investigation of airborne contaminant transport under different vortex structures in the aircraft cabin
Numerical investigation of airborne contaminant transport under different vortex structures in the aircraft cabin
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DOI：
10.1016/j.ijheatmasstransfer.2016.01.004
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发表时间：
2016-05-01
影响因子：
5.2
通讯作者：
Zhu, Yifang
中科院分区：
文献类型：
--
作者：
Li, Fei;Liu, Junjie;Zhu, Yifang
个别乘客释放的病原体、气味和二氧化碳等空气污染物可能会通过机舱内的气流传播，使其他乘客不健康和不舒服。在这项研究中，我们引入了气流涡旋结构来分析气流模式如何影响飞机机舱内的污染物传输。利用气流组织的实验数据对计算流体力学(CFD)模型进行了验证。利用经过验证的CFD模型，在定量分析的基础上，研究了气流旋涡结构对污染物传输的影响。结果表明，位于涡度主导区的污染源更有可能被“锁定”在涡旋中，其平均浓度比变形主导区高62%，停留时间长14%。由于气流结构的不同，机舱前部和后部的污染物浓度也不同。在被加热的人体模型表面附近释放的污染物可能会根据其分布平均位置向后迁移。基于这些结果，飞机机舱内的气流模式可能会得到改善，以更好地控制空气污染物的传播。(C)2016爱思唯尔有限公司。保留所有权利。
Airborne contaminants such as pathogens, odors and CO2 released from an individual passenger could spread via air flow in an aircraft cabin and make other passengers unhealthy and uncomfortable. In this study, we introduced the airflow vortex structure to analyze how airflow patterns affected contaminant transport in an aircraft cabin. Experimental data regarding airflow patterns were used to validate a computational fluid dynamics (CFD) model. Using the validated CFD model, we investigated the effects of the airflow vortex structure on contaminant transmission based on quantitative analysis. It was found that the contaminant source located in a vorticity-dominated region was more likely to be "locked" in the vortex, resulting in higher 62% higher average concentration and 14% longer residual time than that when the source was on a deformation dominated location. The contaminant concentrations also differed between the front and rear parts of the cabin because of different airflow structures. Contaminant released close to the heated manikin face was likely to be transported backward according to its distribution mean position. Based on these results, the air flow patterns inside aircraft cabins can potentially be improved to better control the spread of airborne contaminant. (C) 2016 Elsevier Ltd. All rights reserved.