首页|有限空间空气稳定性下人员呼吸过程暴露风险分析

有限空间空气稳定性下人员呼吸过程暴露风险分析

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  • 国家科技期刊平台
  • NETL
  • NSTL
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以人体呼吸微环境为研究对象,通过全尺寸双人实验与数值模拟方法对有限空间空气稳定性下人员在其呼吸过程中暴露风险进行分析.研究表明:在呼吸气流的初始释放阶段,个体暴露水平主要取决于呼吸活动.随着污染物距离污染源越远,有限空间空气稳定性与通风方式对呼吸微环境中的人员暴露情况的影响越来越重要,且这种影响具有时间无关性.在稳定型中,由于周围分层空气的限制作用,呼出的污染物具有更强的保持其沿初始惯性力方向传播的能力,不易扩散;不稳定型易破坏污染物沿其初始惯性力方向传播的能力,加快污染物的扩散,可以减少室内人员对呼吸微环境中污染物的暴露情况.本研究在控制污染物传播,降低疾病传播风险,保证人体健康方面具有理论及实际意义.
Personal Exposure Risk Assessment of Respiratory Process under Effect of Limited Space Air Stability
This research took the breathing microenvironment as the object to conduct an analysis on personal exposure risk in the human breathing process under the effect of the limited space air stability by means of a full-scale experiment and numerical simulation.The results showed that the personal exposure level mainly depended on the breathing activity during the pollutants initial releasing period.As the pollutants went further,the influence of limited space air stability and ventilation on personal exposure became important and presented a characteristic of time independence.In the stable condition,due to the lock-up effect of the stratified environment,the transport of the exhaled pollutants tended to remain in the initial inertia force direction,and not easy to spread;The unstable condition was more likely to disturb the ability of the initial inertia force transport direction and to accelerate the diffusion of pollutants,thus greatly reducing the personal exposure in the breathing microenvironment.This study has theoretical and practical significance in controlling the transport of pollutants,preventing the spread of disease,and ensuring occupant health.

limited space air stabilitybreathing microenvironmentpersonal exposure riskair distributioncomputational fluid dynamics

邓晓瑞、龚光彩、王瑞、何怡倩、石星、贺习之

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湖南大学 土木工程学院,湖南 长沙 410082

清华大学 建筑学院,北京 100084

湖南工商大学 前沿交叉学院,湖南 长沙 410205

中国核电工程有限公司,北京 100840

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有限空间空气稳定性 呼吸微环境 个体暴露风险 气流组织 计算流体动力学

国家自然科学基金重大项目湖南省重点领域研发计划资助项目湖南省科技成果转化及产业化计划

720915132020DK20032020GK2077

2024

10.16339/j.cnki.hdxbzkb.2024041

湖南大学学报(自然科学版)
湖南大学

湖南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.651
ISSN：1674-2974
年,卷(期)：2024.51(3)
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