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首页> 外文会议>Optical Measurement Systems for Industrial Inspection >Remote sensing of temperature and concentration profiles of a gas jet by coupling infrared emission spectroscopy and LIDAR for characterization of aircraft engine exhaust
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Remote sensing of temperature and concentration profiles of a gas jet by coupling infrared emission spectroscopy and LIDAR for characterization of aircraft engine exhaust

机译：通过耦合红外发射光谱和激光雷达遥感气体射流温度和浓度谱的诱导率飞机发动机排气的特征

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摘要

Temperature data play an important role in the combustion chamber since it determines both the efficiency and the rate of pollutants emission of engines. Air pollution problem concerns the emissions of gases such as CO, CO_2, NO, NO_2, SO_2 and also aerosols, soot and volatile organic compounds. Flame combustion occurs in hostile environments where temperature and concentration profiles are often not easy to measure. In this study, a temperature and CO_2 concentration profiles optical measurement method, suitable for combustion analysis, is discussed and presented. The proposed optical metrology method presents numerous advantages when compared to intrusive methods. The experimental setup comprises a passive radiative emission measurement method combined with an active laser-measurement method. The passive method is based on the use of gas emission spectroscopy. The experimental spectrometer device is coupled with an active method. The active method is used to investigate and correct complex flame profiles. This method similar to a LIDAR (Light Detection And Ranging) device is based on the measurement of Rayleigh scattering of a short laser pulse recorded using a high-speed streak camera. The whole experimental system of this new method is presented. Results obtained on a small-scale turbojet are shown and discussed in order to illustrate the potentials deliver by the sophisticated method. Both temperature and concentration profiles of the gas jet are presented and discussed.
机译：温度数据在燃烧室中起重要作用，因为它决定了发动机排放的效率和污染物速率。空气污染问题涉及诸如CO，CO_2，NO，NO_2，SO_2以及气溶胶，烟灰和挥发性有机化合物的气体排放。火焰燃烧发生在敌对环境中，温度和浓度谱通常不易测量。在该研究中，讨论和呈现了适用于燃烧分析的温度和CO_2浓度分布光学测量方法。与侵入式方法相比，所提出的光学计量方法具有许多优点。实验装置包括无源辐射发射测量方法，与主动激光测量方法结合。无源方法基于气体发射光谱的使用。实验光谱仪装置与活性方法耦合。活性方法用于研究和校正复杂的火焰轮廓。该方法类似于LIDAR（光检测和测距）器件，基于使用高速条纹相机记录的短激光脉冲的瑞利散射的测量。提出了这种新方法的整个实验系统。显示并讨论在小型涡轮喷气发线上获得的结果，以说明通过复杂方法提供的潜力。提出和讨论了气体射流的温度和浓度谱。

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