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An Improved Air Distribution System for Infection Reduction in Economy-Class Passenger Airplanes

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In a previous work performed by the authors, a Personalized Ventilation (PV) system, combined with Under Floor Air Distribution (UFAD) has been found to provide an air shield between passengers in an airplane and reduce the chances of viruses spreading. A new PV system with a front-back design has been adopted. Combined with UFAD, the new system has achieved thermal comfort for the passengers, as well as a reduction of contaminants spreading. However, the PV system can be further improved by changing the air inlet and outlet configurations. In this work, two new PV system configurations are investigated with changed locations of the air outlets. In addition to an improved air shield between passengers and hence better infection reduction, the new configurations have also improved the predictive mean vote to the value of 0.51, and the predicted percentage dissatisfied to 13.9%.
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Airplane Air Conditioning; COVID-19; Infection Control; Thermal Comfort

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ICAO - MID COVID-19 Website (accessed: August 3, 2022).

Martinez, I. Aircraft environmental control, lecture notes, 1-26 (2014).

ICAO - Economic Impacts of COVID-19 on Civil Aviation. (accessed: August 3 , 2022). URL:

Airbus website (Restricted access, accessed: August 3, 2022). URL:

European Centre for Disease Prevention and Control, Risk assessment guidelines for infectious diseases transmitted on aircraft, Technical report (2009).

US Centre for Disease Control website. (accessed: August 3, 2022)

E.A. Nardell, J. Keegan, S.A. Cheney, and S.C. Etkind, Airborne infection. Theoretical limits of protection achievable by building ventilation. Am Rev Respir Dis, 144 (2) 302-306 (1991).

R.L. Riley, and E.A. Nardell, Clearing the air. The theory and application of ultraviolet air disinfection, Am Rev Respir Dis, 139 (5) 1286-1294 (1989).

G.S., Z. Ai, Z. Liu, and G. Zhang. A systematic literature review on smart and personalized ventilation using CO2 concentration monitoring and control, Energy Reports, Vol. 8, 7523-7536 (2022).

E. Katramiz, N. Ghaddar, and K. Ghali. Novel personalized chair-ventilation design integrated with displacement ventilation for cross-contamination mitigation in classrooms, Building and Environment, Vol. 213, 108885 (2022).

Z. Zhang, L. Zeng, H. Shi, H. Liu, W. Yin, J. Gao. L. Wang, Y. Zhang, and X. Zhou. CFD studies on the spread of ammonia and hydrogen sulfide pollutants in a public toilet under personalized ventilation, Journal of Building Engineering, Vol. 46, 103728 (2022).

W. Liu, L. Liu, C. Xu, L. Fu, Y. Wang. P.V.Nielsen, and C. Zhang. Exploring the potentials of personalized ventilation in mitigating airborne infection risk for two closely ranged occupants with different risk assessment models, Energy and Buildings, Vol. 253, 111531 (2021).

C.A. Mboreha, S. Jianhong, W. Yan, S. Zhi, and Z. Yantai. Investigation of thermal comfort on innovative personalized ventilation systems for aircraft cabins: A numerical study with computational fluid dynamics, Thermal Science and Engineering Progress, Vol. 26, 101081 (2021).

Zgodavová, Z., Rozenberg, R., Szabo, S., Sabo, J., The Impact of Changes of Psychophysiological Factors on the Flight Crew Performance, (2019) International Review of Aerospace Engineering (IREASE), 12 (3), pp. 150-158.

M.R. Georgescu, A. Meslem, I. Nastase, and F. Bode. Personalized ventilation solutions for reducing CO2 levels in the crew quarters of the International Space Station, Building and Environment, Vol. 204, 108150 (2021).

E. Katramiz, N. Ghaddar, K. Ghali, D. Al-Assaad, and S. Ghani. Effect of individually controlled personalized ventilation on cross-contamination due to respiratory activities, Building and Environment, Vol. 194, 107719 (2021).

J. Xu, H. Guo, Y. Zhang, and X. Lyu. Effectiveness of personalized air curtain in reducing exposure to airborne cough droplets, Building and Environment, Vol. 208, 108586 (2022).

C. Q. Zhang T, Novel Air Distribution Systems for Commercial Aircrafts Cabins, Buildings and environment, Build Env., 2006.

H. M. and K. E. Farag A., Huzzatin O., Numerical Analysis and Thermal Comfort Optimization of Different Ventilation Systems for Commercial Aircraft Cabins, in IEEE Conference on Aerospace, 2015.

C.H. Cheong, B. Park, and S.R. Ryu. Effect of under-floor air distribution system to prevent the spread of airborne pathogens in classrooms, Case Studies in Thermal Engineering, Vol. 28, 101641 (2021).

S. Cao, F. Li, and X. Li. Numerical study on settlement characteristics of inhalable particles in under-floor air distribution system, Journal of Building Engineering, Vol. 45, 103481 (2022).

M. Taheri, S.A. Zolfaghari, M. Afzalian, and H. Hassanzadeh. The influence of air inlet angle in swirl diffusers of UFAD system on distribution and deposition of indoor particles, Building and Environment, Vol. 191, 107613 (2021).

R. Anwar, Air Distribution Systems in Aircraft Cabins., MSc. dissertation, Cairo University, (2015).

Abdelnasser, B., Ismaiel, A., Abdelmaksoud, W., Fouad, M., An Alternative Air Distribution System in Economy-Class Passenger Airplane for Infection Reduction, (2021) International Review of Aerospace Engineering (IREASE), 14 (5), pp. 260-271.

Samara, M., Vashishtha, A., Watanabe, Y., Suzuki, K., Flow-Field and Performance Study of Coaxial Supersonic Nozzles Operating in Hypersonic Environment, (2020) International Review of Aerospace Engineering (IREASE), 13 (1), pp. 25-39.

Orjuela, S., Valencia, G., Duarte Forero, J., Computational Fluid Dynamics Study of Blow-By in Light Aircraft Diesel Engines, (2020) International Review of Aerospace Engineering (IREASE), 13 (6), pp. 208-216.

Espinel, E., Rojas, J., Florez Solano, E., Computational Fluid Dynamics Study of NACA 0012 Airfoil Performance with OpenFOAM®, (2021) International Review of Aerospace Engineering (IREASE), 14 (4), pp. 201-210.

Marchetto, F., Benini, E., Numerical Simulation of Harmonic Pitching Supercritical Airfoils Equipped with Movable Gurney Flaps, (2019) International Review of Aerospace Engineering (IREASE), 12 (3), pp. 109-122.

Sunil, A., Tide, P., Numerical Investigations on Suppression of Aeolian Vibrations on a Tall Chimney Using Helical Strakes, (2019) International Journal on Engineering Applications (IREA), 7 (5), pp. 152-159.

W.S. Zhang, and P. Li, A Personal Air Distribution System with Air Terminals Embedded in Chair 1 Armrests on Commercial Airplanes, Build. Environ., 2012.

ASHRAE, Standard 55, Thermal Environmental Conditions for Human Occupancy, Atlanta, GA: ASHRAE, (2013).

Ravichandran, A., Storey, J., Kirk, D., A Thermo-Fluid Model of Droplet Evaporation and Pressure Variation in Venturi Liquid-Gas Mixers, (2020) International Review of Aerospace Engineering (IREASE), 13 (3), pp. 108-119.


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