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Experimental validation of local exhaust strategies for improved IAQ in aircraft cabins

机译:改善机舱室内空气质量的局部排气策略的实验验证

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This experimental study examines the effectiveness of using local exhaust to mitigate cross-contamination within an aircraft cabin. Results of a previous computational fluid dynamics (CFD) study indicate significant improvements over conventional cabin mixing air ventilation systems with an average decrease in passenger exposure to body-emitted contaminants upwards of 60% predicted. This is accomplished through the use of localized suction orifices ptaced near and around the source passengers which are designed to unobtrusively ingest the individual's thermal plume and exhaust it from the aircraft cabin before contaminants entrained in the plume can mix with the bulk air supply. To further test and validate the localized exhaust strategies already simulated through CFD, an extensive experimental tracer gas study has been conducted in a business-class cabin mockup and is presented here. Experimental results agree with earlier CFD work and show reductions in exposure to armpit-released contaminants of 30-60% using similar suction methodologies and up to 90% reduction with enhanced designs.
机译:这项实验研究检验了使用局部排气减轻飞机机舱内交叉污染的有效性。先前的计算流体动力学(CFD)研究结果表明,与传统的机舱混合空气通风系统相比,有了显着的改进,乘客暴露于人体排放的污染物中的平均暴露量下降了60%以上。这是通过使用位于源乘客附近和周围的局部吸气孔来实现的,这些吸气孔设计为不引人注意地摄入个人的热羽流,并在夹带的羽流中的污染物与大量空气混合之前将其从机舱中排出。为了进一步测试和验证已经通过CFD模拟的局部排气策略,已经在企业级机舱模型中进行了广泛的实验示踪气体研究,并在此处进行介绍。实验结果与早期的CFD工作相吻合,并显示使用类似的抽吸方法可使腋窝释放的污染物暴露减少30-60%,而采用增强型设计则可减少90%。

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