Mitigation of cross-contamination in an aircraft cabin via localized exhaust

Dygert, Ryan K.; Dang, Thong Q.

doi:10.1016/j.buildenv.2010.01.014

Cited by 44 publications

(30 citation statements)

References 19 publications

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“…Because of the lack of reliable experimental data, researchers have used data from other enclosed environments to validate their models [6,9]. Although CFD codes have been validated for other systems, it is important for these numerical models to be validated for each specific scenario to which they are applied, especially because aircraft cabin environments have highly complex interior geometries and distinctive features [10]. The experiments conducted over the past two decades for the development and validation of CFD codes are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Global airflow field distribution in a cabin mock-up measured via large-scale 2D-PIV

Cao

Liu

et al. 2015

Building and Environment

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Section: Introductionmentioning

confidence: 99%

Global airflow field distribution in a cabin mock-up measured via large-scale 2D-PIV

Cao

Liu

et al. 2015

Building and Environment

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“…23,24 A personalized exhaust system with diffusers in the seat headrest has been shown to improve inhaled air quality and reduce exposure to airborne infection in aircraft cabins. 25,26 Several studies have investigated the use of local cooling systems in a warm environment. Melikov et al 27 found that local convective and radiant cooling of the upper body in a warm environment (28°C, 50%RH) improved thermal comfort compared to a reference condition without cooling.…”

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confidence: 99%

Local body cooling to improve sleep quality and thermal comfort in a hot environment

et al. 2017

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The effects of local body cooling on thermal comfort and sleep quality in a hot environment were investigated in an experiment with 16 male subjects. Sleep quality was evaluated subjectively, using questionnaires completed in the morning, and objectively, by analysis of electroencephalogram (EEG) signals that were continuously monitored during the sleeping period. Compared with no cooling, the largest improvement in thermal comfort and sleep quality was observed when the back and head (neck) were both cooled at a room temperature of 32°C. Back cooling alone also improved thermal comfort and sleep quality, although the effects were less than when cooling 1,2 Disturbed nocturnal sleep also has consequential effects on health, increasing the risk of obesity, Type 2 diabetes, and cardiovascular disease. 3,4 The thermoregulatory system and the sleep regulating mechanisms have been shown to be strongly linked in humans, 5,6 and this was later confirmed by many studies that show high or low air temperatures, even moderately different from the neutral temperature, could significantly decrease sleep quality. 7-10 However, in many areas with long and hot summers, indoor air temperatures are very high. For example, in southern China, the indoor air temperature was found to be higher than 34°C in natural ventilated buildings during the summer season. 11 A survey in Indonesia found that the indoor air temperatures were higher than 32°C in naturally ventilated residential buildings. 12 Global warming that leads to higher temperatures will create still hotter indoor conditions. Attention is now being paid to how climate change may degrade the indoor thermal environment in buildings.13 It has been reported that heat-related deaths correlate, not just with daytime temperature, but also with nighttime temperatures. The highest risk factor for heat-related death is a bedroom located on the second floor without air-conditioning. 14 A study in 79 households in Greenland showed that in summer 19% of all bedroom temperature were above 26°C although the outside temperatures averaged no more than 9.5°C. 15Full air-conditioning may be one of the easiest ways to improve thermal environment. However, large amounts of cool air (often recirculated room air, for residential buildings) must be supplied to maintain indoor temperatures at acceptable levels in the entire building (including unoccupied areas), leading to increased energy consumption. 16Thus, especially in areas with hot summers, the long summer period

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“…Dygert et al [51] used a realizable k-ε model with enhanced wall treatment to study the flow field in a B767 coach-class. Bosbach et al [23] used a low-Reynolds-number model and a two-layer k-ε model for their study on jet separation.…”

Section: Discussionmentioning

confidence: 99%

“…Despite there being some uncertainties in the models, requiring sufficient knowledge of fluid mechanics on the part of a user, and demanding a high capacity computer, CFD has become the most widely used tool for studying air distributions in airliner cabins due to the rapid increase in computer capacity and the development of user-friendly CFD program interfaces. Examples can be found in [9,11,15,19,21,24,25,27,35,37,[44][45][46][47][48][49][50][51][52]. The CFD models used were Reynolds Averaged Navier-Stokes equation (RANS) models and Large Eddy Simulation (LES).…”

Section: Cfd Modelsmentioning

confidence: 99%

State-of-the-art methods for studying air distributions in commercial airliner cabins

Wei

Mazumdar

Zhao

et al. 2012

Building and Environment

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Air distributions in commercial airliner cabins are crucial for creating a thermally comfortable and healthy cabin environment. This paper reviewed the methods used in predicting, designing, and analyzing air distributions in the cabins. Two popular methods are experimental measurements and numerical simulations. The experimental measurements have usually been seen as more reliable although they are more expensive and time consuming. Most of the numerical simulations use Computational Fluid Dynamics (CFD) that can provide effectively detailed information. Numerous applications using the two methods can be found in the literature for studying air distributions in aircraft cabin, including investigations on more reliable and accurate models. Our review shows that studies using both experimental measurements and computer simulations are becoming popular. Our review also found that it is necessary to use a full-scale test rig to obtain reliable and high quality experimental data, and that the hybrid CFD models are rather promising for simulating air distributions in airliner cabins.

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Mitigation of cross-contamination in an aircraft cabin via localized exhaust

Cited by 44 publications

References 19 publications

Global airflow field distribution in a cabin mock-up measured via large-scale 2D-PIV

Global airflow field distribution in a cabin mock-up measured via large-scale 2D-PIV

Local body cooling to improve sleep quality and thermal comfort in a hot environment

State-of-the-art methods for studying air distributions in commercial airliner cabins

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