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针对自发拉曼散射技术应用于实际燃烧场参数测量时面临的主要技术难题,采用XeF(C-A)激光作为激励光源,开展了自发拉曼散射技术实验研究。通过分析拉曼散射过程对光源参数的要求,优化了XeF(C-A)激光器部分参数,建立了自发拉曼散射诊断系统,实现了气体介质主要组分浓度在线测量,对比了XeF(C-A)激光与主流激光作为拉曼散射光源的优缺点。结果表明:与现有主流光源相比,具有脉冲能量大、微秒级脉宽,位于可见光波段等特点的放电抽运XeF(C-A)激光非常适合用作自发拉曼散射激励光源。
Aiming at the main technical difficulties when using spontaneous Raman scattering in the measurement of actual combustion field parameters, an experimental study of spontaneous Raman scattering was carried out using XeF (C-A) laser as the excitation light source. By analyzing the requirements of Raman scattering parameters for the light source parameters, some parameters of XeF (CA) laser were optimized and a spontaneous Raman scattering diagnostic system was established to measure the concentration of main components in the gas medium. The XeF (CA) laser and The advantages and disadvantages of mainstream laser as Raman scattering light source. The results show that the XeF (C-A) laser with a large pulse energy, microsecond pulse width and visible light band is very suitable for use as a source of spontaneous Raman scattering excitation compared with the existing mainstream light sources.