低成本的引气颗粒物检测

Mir Seliman Waez, S. Eckels, C. Sorensen
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引用次数: 0

摘要

引气被引入机舱是为了保持空气质量,以保证乘客和机组人员的健康和舒适。由于压缩机油封泄漏,引气可能被油污染,这类事件时有报道,引起了公众的极大关注。以往的研究测量了进入机舱的引气中的颗粒尺寸分布,但从未区分颗粒物质(PM)的类型和材料。这些微粒可能是有潜在危险的油封泄漏的油滴,冷却系统产生的雾产生的水滴,等等。在这项研究中,我们提出了一种利用光散射技术来区分污染物类型的新技术。这种技术使用尺寸和复折射率作为测量。由于每种材料都有不同的折射率,通过确定折射率,我们提出的低成本探测器可以区分气溶胶中的化合物,同时确定颗粒大小。
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Low-Cost Particulate Detection in Bleed Air
Bleed air is brought into aircraft cabins in order to maintain the quality of the air for passenger and crew health and comfort. The bleed air can be contaminated by oil due to oil seal leaks in the compressor which have been reported randomly and generated significant public interest. Previous studies have measured the particulate size distribution in the bleed air entering the cabin, but never distinguished the type and material of the particulate matter (PM). The particulates could be potentially hazardous oil droplets from the oil seal leaks, water droplets due the presence of fog generated by the cooling system, and so on. In this study we propose a novel technique using light scattering technology to distinguish between contaminant types. This technique uses size and complex index of refraction as the measure. Since each material has a distinct index of refraction, by determining the index of refraction, our proposed low-cost detector could distinguish the compound in the aerosol as well as determine the particle size simultaneously.
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