飞机排气的质量是业界、立法者、监管者、工会和众多技术委员会持续讨论和辩论的话题。这些讨论的处理可能会带来技术进步——可能会支持航空航天行业的新法规。本文介绍的研究范围对于适用于未来商用和军用航空航天飞行器的知识和技术进步非常重要。本文的目的是分享2015年在爱德华兹空军基地对C-17 Globemaster III进行的NASA车辆综合推进研究（VIPR）中获得的排气测量结果。这是业界首次进行的研究，旨在模拟实时运行飞机上罕见的发动机故障情况。 在引气系统的多个位置进行测量，以确定半挥发性和挥发性有机化合物的颗粒大小、浓度和化学浓度，以绘制可能引气污染物的性质。为了防止C-17环境控制系统在测试过程中受到污染，并促进排气测量和取样，设计并建造了一个排气取样系统（BAESS）平台，用于模拟飞机的排气和包装系统，安装在飞机外部，并集成到发动机的排气管道中。此外，BAESS平台上安装了来自不同商业供应商的空气净化和原型传感器技术，用于初步性能评估。 通过位于BAESS平台内不同站点的各种类型的取样介质收集注入发动机机油中的化学污染物；这些产品随后通过GC/MS US EPA方法进行分析。分析后，发现排放空气中的污染物浓度不超过既定的OSHA PEL和STEL。VIPR研究得出的数据和科学结论将用于开发未来技术，以提高飞机引气系统的性能。引文:2017年冬季会议，内华达州拉斯维加斯，会议论文

The quality of airplane bleed air is a topic of ongoing discussion and debate among industry, legislators, regulators, unions and numerous technical committees. The disposition of these discussions may lead to advancements in technology -- potentially supporting new regulations for the aerospace industry. The scope of the research presented herein is important for knowledge and technological advancement that is applicable to both future commercial and military aerospace vehicles. The objective of this paper is to share results from bleed air measurements obtained from the NASA Vehicle Integrated Propulsion Research (VIPR) study conducted on a C-17 Globemaster III at Edwards Air Force Base in 2015. This industry-first research has been conducted to simulate a rare engine upset failure condition on a real time operating aircraft. Measurements to identify particulate sizes and concentrations and chemical concentrations of semi-volatile and volatile organic compounds were taken at multiple locations in the bleed air system to map the nature of possible bleed air contaminants. In order to prevent contamination of the C-17 environmental control systems during testing and to facilitate bleed air measurements and sampling, a bleed air extraction sampling system (BAESS) platform designed and built to simulate the aircraft's bleed air and pack systems, was installed outside of the aircraft and integrated into an engine's bleed air ducting. Furthermore, air purification and prototype sensor technologies from various commercial suppliers were installed aboard the BAESS platform for preliminary performance evaluations. Chemical contaminants from the injected engine oil were captured by various types of sampling media located at different stations within the BAESS platform; these products were subsequently analyzed by GC/MS US EPA methods. After analysis, it was found that no concentration of contaminants in the bleed air exceeded established OSHA PEL and STEL. The data and scientific conclusions stemming from the VIPR study will be used to develop future technologies to enhance the performance of airplane bleed air systems.