| The outside environment of the aircraft can vary dramatically when the aircraft fly in the atmosphere. The pressure may range from one atmospheric pressure to nearly a vacuum state. There is also a huge change in the temperature and humidity. The impurities in the air supplying from the engine and the carbon dioxide breathed from passengers will also affect the aircraft cabin environment. Cabins, a confined space where passengers work and live, need a suitable air flow field, comfortable supplying temperature and enough fresh air to guarantee the passengers’ living and working. There are also many standards claiming the requirements for the air flow field inside a civil aircraft.In order to study the aircraft cabin internal environment, this article selected a certain type of civil aircraft as the research object and applied Computational Fluid Dynamics(CFD) to calculate the aircraft air flow field. The cabin model was simplified after reasonable analysis. The software ICEMCFD was used to complete mesh generation. In addition, this article applied FLUENT to calculate the cabin air temperature field, velocity field and carbon dioxide concentration distribution under two kinds of air supply plans. Finally, a best supply plan was chosen after the calculation.In this article, the model of Gagge two node body temperature regulation was used to calculate the variation of the human body temperature. The program for two node model was written with MATLAB. Using this program, the variation of the body skin and core temperature under different air temperature and velocity were compared. At last, the environmental thermal comfort was evaluated by the standard effective temperature. |
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