| Citation: | LIN J Q，LI B，QIU Y H. Removal cabin bleeding air system gaseous pollutants method based on air conditioning sinusoidal wind[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（5）：1009-1016 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0422
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The gaseous pollutants get into the cabin by the engine bleeding air system when the plane is waiting for taking off on the apron. However, the cabin air conditioning wind speed is constant, and the removal efficiency of the bleeding gaseous pollutants is low. To solve this problem, the Boeing737 cabin simulation model was established and the accuracy of the cabin simulation model was verified by particle image velocimetry (PIV) experiment. The air conditioning used sinusoidal wind instead of the constant wind, and used NO2 as bleeding air pollutant. Three work modes of air supply, the ceiling air supply, sidewall air supply and mixed air supply were simulated. The distribution results of NO2 in passenger breathing areas and cabin were obtained by constant wind and sinusoidal wind. A method based on air age and draft rating index (DR) was proposed to evaluate the best air conditioning work mode, which is efficient in removing cabin gaseous pollutants. In 180 seconds, the average concentration of NO2 decreased by 7.95% by sinusoidal wind ceiling air supply mode. The sinusoidal wind sidewall air supply mode decreased by 6.51%, and the sinusoidal wind mixed air supply mode decreased by 23.3%. The sinusoidal wind mixed air supply mode has the best effect on the removal of NO2 and the minimum air age. The draft rating index meets the requirements of thermal comfort.
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