CFD Investigation of Crew Oxygen Cylinder Leakage Concentration in Triangle Area of Civil Aircraft

A computational model applied with RANS turbulence is developed to solve the oxygen leakage concentration distribution problem in the triangle area of civil aircraft during a cruise. We consider a steady-state simulation of oxygen leakage. We have a concentration distribution investigation in three different directions of the triangle area, illustrating the effects of the ventilation system. Results show that more than 25% of the oxygen concentration is mainly concentrated in the small area of the leakage port of the unit's oxygen cylinder regulator and the area under the floor. This means the ventilation system can effectively and quickly dilute the high concentration oxygen.