Research on 1D-2D Co-simulation for Cabin Air Environment Accident

Abstract With the commercial aircraft widely used, flight accidents related to the aircraft cabin happened sometimes, which is a serious threat to the flight safety. According to incomplete statistics, there are 1.5 times of accidents related to the aircraft cabin environment throughout the world. In some accidents, smoke containing toxic air enter the cabin and threaten the passengers. In recent years more and more attention is paid to the aircraft cabin environment, which is mainly about two areas: one is the research on the unsteady distribution law of cabin air environment and the nonlinear diffusion mechanism of pollutants via the technology of Computational Fluid Dynamic(CFD),the other is the research on parameters characteristic of components in the ECS(Environment Control System) with the system simulation. However, research accomplished related to the two areas above is mostly under normal condition of aircraft ECS, attention to the simulation of cabin air environment accident is more and more needed. Furthermore, it is necessary that 1D ECS simulation model and 2D CFD model are combined together, considering the complete parameters time history from 1D ECS components to the 2D aircraft cabin when doing the research on cabin environment accident. This paper describe a cabin environment smoke accident simulation with a 1D-2D co-simulation technology.