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CFD modeling of dynamic airflow and particle transmission in an aircraft lavatory

建筑模拟(英文) 2023年第8期16卷 1375-1390页

作者： Pin Li Wei Liu Tengfei(Tim)Zhang Tianjin Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjinChina School of Civil Engineering Dalian University of TechnologyDalianChina Division of Sustainable Buildings Department of Civil and Architectural EngineeringKTH Royal Institute of TechnologyBrinellvägen 23Stockholm10044Sweden

Lavatories are frequently used facilities,especially on long-haul *** a vacuum toilet in a lavatory can induce strong airflow,produce aerosols in the toilet bowl,and resuspend deposited particles from the ***,the exact particle transport routes and the fates of particle after toilet flushing are unclear so *** investigation used computational fluid dynamics(CFD)to model the transient airflow and pollutant transport after a toilet flushing process in a lavatory of a commercial *** time-varying pressure profile measured in a laboratory was assigned to the drainage valve as boundary *** aerosols generated inside the toilet bowl during flushing and the particles resuspended from the lavatory floor were used as particle *** tracking of airborne particles in the lavatory was *** addition,ammonia gas was used to examine odor *** multi-physics software program COMSOL 5.4 was employed for numerical solution after being *** results revealed that more than 70%of the generated particles in the toilet bowl are drained into sewage.A few particles may leak out of the toilet bowl and remain suspended in the air for more than five minutes when the toilet lid is open during *** the toilet with a closed lid can effectively reduce the particle leakage and the spread of odor gas,but it leads to greater deposition of particles on both the lid and *** is a slight inhalation exposure risk in the initial three minutes after flushing with a closed lid.

关键词： lavatory vacuum toilet flushing particle odor gas CFD

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