Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
PERFORMANCE EVALUATION OF MIXING AND DISPLACEMENT VENTILATION SYSTEMS ON THE DISPERSION AND REMOVAL OF EXPIRATORY DROPLETS IN AN AIRCRAFT CABIN: AN EXPERIMENTAL ANALYSIS
Submission Author:
Douglas Fabichak Junior , SP , Brazil
Co-Authors:
Douglas Fabichak Junior, Victor Felix, Arlindo Tribess
Presenter: Douglas Fabichak Junior
doi://10.26678/ABCM.COBEM2019.COB2019-2411
Abstract
This article presents results of dispersion and removal of expiratory droplets for two ventilation systems in an aircraft mock-up cabin: the conventional aircraft Mixing Ventilation system (MV) and the Displacement Ventilation system (DV) usually used in buildings. The performance tests were performed inside a mock-up of a regional aircraft cabin with 12 seats, 3 rows with 4 abreast. Passengers were simulated using heated manikins. The tests were performed considering air supply temperature conditions at 18 °C and particle generation at two points at the end of the cabin: near the fuselage and near the aisle. Particles simulating a person sneezing were generated and measured at the breathing zone, 1.10 m from the floor. The results showed that the proposal DV system can be used successfully in aircraft cabins regarding dispersion and effectiveness in removal expiratory droplets. The DV system compared to the conventional system MV reduced the dispersion of particles along the cabin and increased the removal of particles up to 31.4% for particles of 2 to 3 m, and up to 32.0% for particles of 3 to 5 m. Finally, it is important to emphasize the greater efficiency of the DV system in removal small particles compared with the MV system. It is particularly important since smaller particles are easily inhaled and can cause serious health problems.
Keywords
Ventilation systems, Air quality, Expiratory droplets, experimental analysis, Aircraft cabins
