| Citation: | GAO J C，CHEN W J，HU W J，et al. Analysis of CO2 distribution characteristics in cabin of civil aircraft[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（9）：2510-2517 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0683
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The interior of civil aircraft cockpit is relatively closed, the air circulation is not smooth, the personnel density is large, and there are organic heat sources such as personnel and electronic equipment. It is essential to have a firm grasp of the flight envelope’s CO2 concentration, temperature distribution, and air velocity in order to certify civil aircraft as airworthy. The research introduced in this paper uses the computational fluid dynamics (CFD) method to simulate the flow field in the civil aircraft cockpit. The distribution of CO2 concentration, temperature field, and velocity field in the cockpit under various operating conditions is determined by varying the return air and fresh air temperatures, cruise altitude, and return air ratio. Compared with the existing literature data, the correctness of the calculation model is verified. The research results show that the flow field in the cabin in the ground standard day and cruise state basically meets the requirements. When the air supply is 50 ℃ and the return air ratio is 0.5 in winter, the temperature in some areas of the cabin is higher, and the CO2 concentration increases and approaches the standard value. The environmental control system scheme can be determined according to the actual needs.
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