Chaotic behavior of human thermal plumes in an aircraft cabin mockup

Wang, Congcong; Liu, Junjie; Li, Jiayu; Li, Fēi

doi:10.1016/j.ijheatmasstransfer.2017.11.059

Cited by 21 publications

(9 citation statements)

References 24 publications

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“…The characteristics of airflows and particle distributions in airliner cabins are usually determined by experimental measurements [ [31] , [32] , [33] , [34] ] and numerical simulations [ [35] , [36] , [37] , [38] ]. The air distribution affects the distribution of particles and spread of pathogenic microbial aerosol particles [ 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Liu

Cao

et al. 2022

Building and Environment

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Section: Introductionmentioning

confidence: 99%

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Liu

Cao

et al. 2022

Building and Environment

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“…This paper primarily analyses the two-dimensional space, so the embedding dimension is two, and the delay time was calculated according to an auto-correlation function. 36 From the two-dimensional phase space reconstruction in Figure 13, we find that as the air supply speed decreases, the reconstruction dimensionless velocity points increase, and the gathered area becomes increasingly smaller. In the case of an air supply speed of 2.7 m/s, the reconstruction points are scattered, and the reconstruction area is the largest and has an elliptical shape, indicating that the speed fluctuation value changes greatly.…”

Section: Resultsmentioning

confidence: 98%

Evaluation of dynamic airflow structures in a single-aisle aircraft cabin mockup based on numerical simulation

Wang

Zhang

Chao

et al. 2021

Indoor and Built Environment

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The airflow distribution characterised by different large- and small-scale eddies in the aircraft cabin is the most important factor to maintain passengers' thermal comfort and to remove contaminants. The airflow distributions in narrow-body aircraft cabins are based on the principle of mixing ventilation. Opposing jets from air diffusers can cause stream deflection and oscillation, which results in the asymmetry of large-scale instantaneous airflow structures. This dynamic airflow structure is very important for analysing time series parameters. Therefore, this study applied numerical simulation to examine the oscillation and asymmetry of instantaneous airflow field structures and phase space reconstruction and used spectrum analysis to evaluate the oscillation amplitude and period of dynamic airflow structure. We also studied the factors that influence the dynamic airflow structure, such as air supply speeds, air supply angles and the strength of the thermal plume. The results showed that as the air supply speed increased, the swing amplitude of the instantaneous airflow structure increased, while the period decreased. The air supply angle affected the jet attachment and collision angle, which in turn affected the swing amplitude and period. The thermal plume restrained the formation of large-scale swings and contributed to the appearance of small-scale structures.

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“…The detailed geometry boundary conditions can be found in previous studies. 21,[24][25][26] Figure 1(b) shows the air conditioning system of the cabin mockup and thermostatic chamber under mixing ventilation. Two air condition systems were designed to control the air and surface temperature in the cabin mockup and thermostatic chamber.…”

Section: Aircraft Cabin Mockupmentioning

confidence: 99%

Experimental study of thermo-fluid boundary conditions, airflow and temperature distributions in a single aisle aircraft cabin mockup

Wang

Zhang

Chen

et al. 2020

Indoor and Built Environment

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Aircraft cabin mockup has been accepted as a benchmark tool to study the aircraft cabin environment. Some researchers used computational fluid dynamics to predict the cabin environment, but the model always needs to be validated by accurate and comprehensive experimental data obtained from the cabin mockup. This study measured thermo-fluid boundary conditions, airflow and temperature distributions by appropriate instruments in a full-scale seven-row aircraft cabin mockup. We used an improved interpolation method to obtain the airflow and temperature distributions. For airflow fields, the interpolation regions were determined based on the sampling location. For the temperature field, in addition to sampling locations, cabin wall temperatures were also needed to be set as interpolation boundary. Non-uniformity coefficient was applied to evaluate homogeneities of air supply velocities and zonal wall temperatures. The measurement error and uncertainty were quantified in detail to evaluate measurement accuracy. We found that the uncertainty of the air supply velocity measured by hot-sphere anemometers was lower than that of airflow field velocity measured by ultrasonic anemometers.

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Chaotic behavior of human thermal plumes in an aircraft cabin mockup

Cited by 21 publications

References 24 publications

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Evaluation of dynamic airflow structures in a single-aisle aircraft cabin mockup based on numerical simulation

Experimental study of thermo-fluid boundary conditions, airflow and temperature distributions in a single aisle aircraft cabin mockup

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