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首页> 外文期刊>Measurement Science & Technology >Dual-pump coherent anti-Stokes Raman scattering system for temperature and species measurements in an optically accessible high-pressure gas turbine combustor facility
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Dual-pump coherent anti-Stokes Raman scattering system for temperature and species measurements in an optically accessible high-pressure gas turbine combustor facility

机译：双泵相干反斯托克斯拉曼散射系统，用于在光学可访问的高压燃气轮机燃烧室中测量温度和物质

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摘要

The development and implementation of a dual-pump coherent anti-Stokes Raman scattering (DP-CARS) system employing two optical sub-systems to measure temperature and major species concentrations at multiple locations in the flame zone of a high-pressure, liquid-fueled gas turbine combustor are discussed. An optically accessible gas turbine combustor facility (GTCF) was utilized to perform these experiments. A window assembly has been designed, fabricated, and assembled in the GTCF to allow optical access from three directions using a pair of thin and thick fused silica windows on each side. A lean direct injection (LDI) device consisting of an array of nine integrated air swirlers and fuel injectors was operated using Jet-A fuel at inlet air temperatures up to 725 K and combustor pressures up to 1.03 MPa. The DP-CARS system was used to measure temperature and CO_(2)/N_(2) concentration ratio on single laser shots. An injection-seeded optical parametric oscillator (OPO) was used as a narrowband pump laser source in order to potentially reduce shot-to-shot fluctuations in the CARS data. Large prisms mounted on computer-controlled translation stages were used to direct the CARS beams either into the main leg optical system for measurements in the GTCF or to a reference leg optical system for measurements of the non-resonant spectrum and for alignment of the CARS system. The spatial maps of temperature and major species concentrations were obtained in high-pressure LDI flames by translating the CARS probe volume in the axial and vertical directions inside the combustor rig without loss of optical alignment.
机译：双泵相干反斯托克斯拉曼散射（DP-CARS）系统的开发和实现，该系统采用两个光学子系统来测量高压液体燃料在火焰区域中多个位置的温度和主要物质浓度讨论了燃气轮机燃烧室。利用光学可访问的燃气轮机燃烧室设备（GTCF）进行这些实验。窗组件已在GTCF中进行了设计，制造和组装，以允许在每一侧使用一对薄而厚的熔融石英窗从三个方向进行光学访问。由Jet-A燃料在进气温度高达725 K和燃烧室压力高达1.03 MPa的条件下运行的由9个集成式空气旋流器和燃料喷射器组成的稀薄直接喷射（LDI）设备。 DP-CARS系统用于测量单次激光照射的温度和CO_（2）/ N_（2）浓度比。为了潜在地减少CARS数据中的逐次波动，将注入种子的光参量振荡器（OPO）用作窄带泵浦激光源。安装在计算机控制的平移台上的大型棱镜用于将CARS光束引导到主腿光学系统中进行GTCF中的测量，或者引导至参考腿光学系统中以进行非共振光谱的测量以及CARS系统的对准。通过在燃烧设备内部沿轴向和垂直方向平移CARS探头体积而不会损失光学对准，可以在高压LDI火焰中获得温度和主要物质浓度的空间图。

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