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为研究环境对人类呼吸系统的影响,特别是微颗粒对人呼吸系统的影响,本文研究了成年男性在打喷嚏状态下环境颗粒和气流在呼吸道内的运动特性,采用计算流体力学方法对基于数值化重建的全真人体模型进行了气固两相流动的研究。结果表明,真实人体上呼吸道结构复杂,流场复杂,气管与鼻腔衔接部位的非对称性导致了气流和颗粒分布不均,左右鼻腔出口的气流速度相差达48.9%,颗粒浓度相差137.7%。结果揭示了在非正常呼吸条件下,当左右鼻腔出口气流分布不均匀时,其污染区域将大于假设左右鼻腔出口气流分布均匀的情况。
In order to study the effect of environment on human respiratory system, especially the effect of microparticles on the human respiratory system, this paper studied the motion characteristics of environmental particles and airflow in the respiratory tract of adult male under sneezing condition. Computational fluid dynamics Reconstruction of the whole real manikin gas-solid two-phase flow research. The results showed that the complex structure and complex flow field in the real human body resulted in asymmetric airflow and particle distribution. The air velocity at the left and right nasal outlets differed by 48.9% and 137.7% respectively. The results revealed that under non-normal breathing conditions, when the airflow distribution at the left and right nasal outlets were not uniform, the contaminated area would be larger than if the airflow distribution at the left and right nasal outlets were assumed to be uniform.