Improving comfortable environmental conditions for passengers is the airliners interest in the recent decades. This can be satisfied by studying air distribution systems and factors affecting on achieving this goal inside the cabin to make a healthy and comfortable environment for the passengers and cabin crew. This Research was done by using Commercial CFD software that has new features that can improve the results. The standard air distribution systems used in recent air cabin are combined between mixing ventilation and personalized ventilation and this study will make simple applicable modification on the ventilation system that can improving the ventilation efficiency, thus safe passengers from being infected from each other. Commercial airplane environmental control systems (ECS) currently using Mixing air ventilation systems, that are necessary to make a safe, thermally and healthy comfortable cabin environment. The CFD Program run on after meshing the modeling for more than 7 million mesh element size for both cases that are simulated on it. Its modeling techniques solved the equations of energy, momentum, continuity and species transport as well as RNG kepsilon model equations for turbulence closure. The PMV and PPD indices were used to predict the thermal comfort in the present study.

Keywords: CFD, Thermal Comfort, Personalized Ventilation, PMV, PPD