Design and computational fluid dynamics investigation of a personal, high flow inhalable sampler.
Design and computational fluid dynamics investigation of a personal, high flow inhalable sampler.
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个人高流量吸入采样器的设计和计算流体动力学研究。
DOI：
10.1093/annhyg/meq029
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Volckens,John
中科院分区：
文献类型：
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作者：
Anthony,TRenée;Landázuri,AndreaC;VanDyke,Mike;Volckens,John
本研究的目的是开发一种入口，以满足在10 l min - 1流量下使用标准的37 mm盒的可吸入取样标准。我们为该盒式磁带设计了一个多孔封头，并使用计算流体动力学（CFD）建模对其性能进行了评估。在风速为0.4 m s−1的迎风风洞环境中，模拟了颗粒吸进效率，采样器的下倾角为0°（水平）和30°。向下定向30°的多孔大流量采样器与已发表的人体模型风洞研究和类人CFD研究结果基本一致，而水平定向会导致过采样。然而，在所有情况下，液体颗粒的吸入不足，相对于固体颗粒的吸入效率低41-84%。在10 l min−1时，还研究了具有单个15 mm中心孔的取样器，发现其对固体颗粒的吸入效率与多孔取样器相匹配；期望单孔取样器更适合于液体颗粒的使用。
The objective of this research was to develop an inlet to meet the inhalable sampling criterion at 10 l min−1flow using the standard, 37-mm cassette. We designed a porous head for this cassette and evaluated its performance using computational fluid dynamics (CFD) modeling. Particle aspiration efficiency was simulated in a wind tunnel environment at 0.4 m s−1freestream velocity for a facing-the-wind orientation, with sampler oriented at both 0° (horizontal) and 30° down angles. The porous high-flow sampler oriented 30° downward showed reasonable agreement with published mannequin wind tunnel studies and humanoid CFD investigations for solid particle aspiration into the mouth, whereas the horizontal orientation resulted in oversampling. Liquid particles were under-aspirated in all cases, however, with 41–84% lower aspiration efficiencies relative to solid particles. A sampler with a single central 15-mm pore at 10 l min−1was also investigated and was found to match the porous sampler’s aspiration efficiency for solid particles; the single-pore sampler is expected to be more suitable for liquid particle use.