Near fields of gasper jet flows with wedged nozzle in aircraft cabin environment

Tang, Zhizhong; Cui, Xujia; Guo, Yong; Jiang, Nan; Dai, Shen; Liu, Junjie

doi:10.1016/j.buildenv.2017.08.047

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…For investigation of the air distribution in aircraft cabins, laboratory tests have been carried out in small cabin mock-ups to characterize the jets along the diffusers, 13 the main flow in the cabin, [14][15][16] thermal plumes from heated manikins, 17 and gasper-induced flow. [18][19][20][21] At the same time, efforts have been made to evaluate contaminant transport in cabins. For instance, Zhang et al 22 measured the air velocity, temperature, and gaseous and particulate contaminant concentrations in a section of a half-occupied, twin-aisle cabin mockup with a mixing ventilation system.…”

Section: Introductionmentioning

confidence: 99%

“…For investigation of the air distribution in aircraft cabins, laboratory tests have been carried out in small cabin mock‐ups to characterize the jets along the diffusers, the main flow in the cabin, thermal plumes from heated manikins, and gasper‐induced flow . At the same time, efforts have been made to evaluate contaminant transport in cabins.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the commercial airliner cabin environment with different air distribution systems

You

Lin

Wei³

et al. 2019

Indoor Air

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Ventilation systems for commercial airliner cabins are important in reducing contaminant transport and maintaining thermal comfort. To evaluate the performance of a personalized displacement ventilation system, a conventional displacement ventilation system, and a mixing ventilation system, this study first used the Wells-Riley equation integrated with CFD to obtain the SARS quanta value based on a specific SARS outbreak on a flight. This investigation then compared the three ventilation systems in a seven-row section of a fully occupied, economy-class cabin in Boeing 737 and Boeing 767 airplanes. The SARS quanta generation rate obtained for the index patient could be used in future studies. For all the assumed source locations, the passengers' infection risk by air in the two planes was the highest with the mixing ventilation system, while the conventional displacement ventilation system produced the lowest risk. The personalized ventilation system performed the best in maintaining cabin thermal comfort and can also reduce the infection risk. This system is recommended for airplane cabins. K E Y W O R D S computational fluid dynamics (CFD), displacement ventilation, infectious disease transmission, mixing ventilation, personalized ventilation, thermal comfort | 841 YOU et al.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating the commercial airliner cabin environment with different air distribution systems

You

Lin

Wei³

et al. 2019

Indoor Air

View full text Add to dashboard Cite

show abstract

“…This type of ventilation system cleans air with high-efficiency particulate air (HEPA) filters and supplies the air to the cabin through shoulder diffusers and/or ceiling diffusers, exhausting air through side diffusers near the floor of the cabin. Unfortunately, the heat rejection efficiency [ 16 ] and pollutant transmission control [ [17] , [18] , [19] , [20] ] of MV systems are not satisfactory. To provide a healthy and comfortable environment to passengers and crew members, a new type of ventilation system must be developed for airliner cabins.…”

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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“…8,9,37 Although the aircraft ventilation & air conditioning system is equipped with high-efficiency particulate absorbing (HEPA) filters that can stop 99.95% of contaminants with a diameter greater than 0.3 μm as standard, the droplet containing pathogencarrying nuclei can sediment on cabin surfaces or reach co-passengers bodies before it would sink into ventilation outlets. Even the relatively high number [20][21][22][23][24][25][26][27][28][29][30] of air changes per hour (ACH) in the case of aircraft cabins can prevent only a fraction of contaminant from reaching any surface as particle suspension time may be an order of magnitude smaller than the age of air (AoA) at some stagnant locations.…”

Section: Introductionmentioning

confidence: 99%

Air curtain as a SARS-CoV-2 spreading mitigation method in a small aircraft cabin

Kurec

Olszański

Gumowski

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper discusses an application of air curtain for reduction of virus-laden droplets transmission from an infected host to other passengers in a small aircraft cabin. The study is restricted to respiratory droplets emitted during coughing. Discrete Particle Method introduced for violent respiratory events (VRE) captured in detail the movement of coughing puff inside the cabin and allowed to study the interaction of droplets with the air curtain’s stream and the surrounding air. The results show that the application of the air curtain inhibits the transmission process of small droplets (diameters ranging from 10 to 40 μm). The air curtain supplied with a limited air mass flow cannot alter the multiphase puff dynamics, but it can be utilized to deflect the virus droplets with lower momentum away from the neighboring passenger. Improved removal efficiency of virus-laden droplets has been achieved owing to the application of the air curtain together with supplementary suction surfaces introduced on the front seat backrest. The virus (SARS-CoV-2) transmission process was also analyzed by means of mass concentration of CO2 exhaled by the infected host, used as a contamination tracker. This part of the work aims at assessment of an applicability of CO2 tracer gas in analysis of virus transmission. Results show that CO2 tracer gas can only be employed for the study of small size droplets dispersion (diameter less or equal to 40 μm).

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Near fields of gasper jet flows with wedged nozzle in aircraft cabin environment

Cited by 8 publications

References 15 publications

Evaluating the commercial airliner cabin environment with different air distribution systems

Evaluating the commercial airliner cabin environment with different air distribution systems

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

Air curtain as a SARS-CoV-2 spreading mitigation method in a small aircraft cabin

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