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首页> 外文期刊>Journal of Applied Mechanics and Technical Physics >AEROSOL ASPIRATION INTO A CYLINDRICAL SAMPLER FROM A LOW-VELOCITY DOWNWARD FLOW AND FROM CALM AIR
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AEROSOL ASPIRATION INTO A CYLINDRICAL SAMPLER FROM A LOW-VELOCITY DOWNWARD FLOW AND FROM CALM AIR

机译：从低速向下流和无色空气中将气溶胶吸入到圆柱状采样器中

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摘要

The problem of aerosol aspiration into a two-dimensional cylindrical sampler from, a low-velocity downward flow and from calm air is solved. A simple analytical model for the velocity field of the carrier medium in the vicinity of the sampler with allowance for the finite size of the input orifice is proposed. Parametric studies of the aspiration factor as a function of the Stokes number for different ratios of the free-stream, and aspiration velocities and different gravity-induced sedimentation velocities for two positions of the sampler are performed. Sedimentation of particles on the lower side of the cylinder for the sampler with a downward-oriented orifice is discussed.
机译：解决了从低速向下流和从稳定空气向二维圆柱形采样器中吸入气溶胶的问题。提出了一种简单的分析模型，用于分析采样器附近的载体介质的速度场，并考虑到输入孔的有限尺寸。对于自由流的不同比率，以及对于采样器的两个位置的吸气速度和不同的重力感应沉降速度，对吸气因子作为斯托克斯数的函数进行了参数研究。讨论了带有向下孔口的采样器圆柱体下侧的颗粒沉淀。

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