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Keywords = commercial aircraft ventilation

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15 pages, 13037 KB  
Article
Droplets Transmission Mechanism in a Commercial Wide-Body Aircraft Cabin
by Benben Kong, Yitao Zou, Mengmeng Cheng, Hong Shi and Yanlong Jiang
Appl. Sci. 2022, 12(10), 4889; https://doi.org/10.3390/app12104889 - 12 May 2022
Cited by 16 | Viewed by 2792
Abstract
COVID-19 is a respiratory infectious disease that spreads readily between people, and an urgent issue of passengers’ exposure risk assessment in commercial aircraft has been raised because an aircraft cabin as a confined space may carry and transmit the disease worldwide. In this [...] Read more.
COVID-19 is a respiratory infectious disease that spreads readily between people, and an urgent issue of passengers’ exposure risk assessment in commercial aircraft has been raised because an aircraft cabin as a confined space may carry and transmit the disease worldwide. In this study, the droplets transmission process under different ventilation systems in a twin-aisle wide-body aircraft was studied using CFD simulations and the infection risk of passengers was assessed by the improved Wells–Riley model. Numerical results found that the transmission mechanism of droplets in the aircraft cabin was different depending on the type of ventilation systems and the location of the infectious source. Annular airflow could effectively enhance the ability of droplets transmission, while direct airflow, represented by displacement ventilation, could significantly inhibit droplets transmission. Accordingly, a new type of ventilation system was proposed based on the concept that the overall space is organized by annular airflow and the local area is direct airflow. Compared with sidewall mixing ventilation system, the infection risk of the new ventilation system presented in this study is reduced by 27%. Full article
(This article belongs to the Section Aerospace Science and Engineering)
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24 pages, 110920 KB  
Article
Personalized Ventilation as a Possible Strategy for Reducing Airborne Infectious Disease Transmission on Commercial Aircraft
by Paul Danca, Costin Ioan Coşoiu, Ilinca Nastase, Florin Bode and Matei Razvan Georgescu
Appl. Sci. 2022, 12(4), 2088; https://doi.org/10.3390/app12042088 - 17 Feb 2022
Cited by 18 | Viewed by 5208
Abstract
In the last decade, there has been an increase in ease and affordability of air travel in terms of mobility for people all around the world. Airplane passengers may experience different risks of contracting airborne infectious diseases onboard aircraft, such as influenza or [...] Read more.
In the last decade, there has been an increase in ease and affordability of air travel in terms of mobility for people all around the world. Airplane passengers may experience different risks of contracting airborne infectious diseases onboard aircraft, such as influenza or severe acute respiratory syndrome (SARS-CoV-1 and SARS-CoV-2), due to nonuniform airflow patterns inside the airplane cabin or proximity to an infected person. In this paper, a novel approach for reducing the risk of contracting airborne infectious diseases is presented that uses a low-momentum personalized ventilation system with a protective role against airborne pathogens. Numerical simulations, supported by nonintrusive experimental measurements for validation purposes, were used to demonstrate the effectiveness of the proposed system. Simulation and experimental results of the low-momentum personalized ventilation system showed the formation of a microclimate around each passenger with cleaner and fresher air than produced by the general mixing ventilation systems. Full article
(This article belongs to the Special Issue Urban Sustainability and Resilience of the Built Environments)
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