On the inertial range of particles under the influence of local exhaust hoods.
On the inertial range of particles under the influence of local exhaust hoods.
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关于局部排气罩影响下颗粒物的惯性范围。
DOI：
10.1093/annhyg/meg014
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Flynn,MichaelR
中科院分区：
文献类型：
--
作者：
Flynn,MichaelR
本文介绍了数值模拟的结果，该数值模拟旨在估计从局部排气罩喷射出的大气溶胶颗粒的惯性范围（停止距离）。势流理论用于指定沿法兰圆形罩中心线的空气速度。高阶齿轮方法用于对粒子运动方程与过渡范围内的阻力系数进行积分。结果允许根据将粒子阻止在指定距离内所需的能量成本来对引擎盖性能进行相对比较。防护罩尺寸被证明是一个关键因素，而防护罩在颗粒喷射点产生的捕获速度是次要的。
This paper presents results from numerical simulations conducted to estimate the inertial range (stopping distance) of large aerosol particles ejected away from local exhaust hoods. Potential flow theory is used to specify the air velocity along the centerline of a flanged circular hood. A high-order Gear method is used to integrate the particle equations of motion with drag coefficients in the transitional range. The results allow for a relative comparison of hood performance based on the energy cost needed to stop the particle within a specified distance. Hood size is shown to be a critical factor, while the capture velocity generated by the hood at the point of particle ejection is of secondary importance.