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可调谐二极管激光器吸收光谱技术(Tunable Diode Laser Absorption Spectroscopy,TDLAS)广泛应用于碳氢燃料燃气参数(温度、组分浓度和气流速度)实时在线和非接触测量。针对碳氢燃料火箭基组合循环(Rocket Based Combined Cycle,RBCC)发动机的高速燃气参数测量,设计了双交叉光束(7444.352+7444.371)/7185.597cm-1谱线对扫描波长-时分复用双线直接吸收光谱技术(Direct Absorption Spectroscopy,DAS)系统,将其应用于RBCC地面实验高速燃气参数在线测量,同时获得了燃气温度、H2O组分浓度和速度等多参数,并将测量结果与数值模拟计算结果对比,相对偏差不超过12%,这为RBCC发动机燃烧组织优化和结构优化提供重要依据。
Tunable Diode Laser Absorption Spectroscopy (TDLAS) is widely used in real-time on-line and non-contact measurement of hydrocarbon fuel gas parameters (temperature, component concentration and gas flow velocity). Aiming at the measurement of high speed gas parameters of hydrocarbon rocket based combined cycle (RBCC) engine, a double crossbeam (7444.352 + 7444.371) /7185.597cm-1 spectral line was designed to measure the wavelength and time- Absorption Spectroscopy (DAS) system was applied to online measurement of high speed gas parameters in RBCC terrestrial experiments. At the same time, multi-parameters such as gas temperature, H2O concentration and velocity were obtained. The measured results and numerical simulation results In contrast, the relative deviation does not exceed 12%, which provides an important basis for the optimization of combustion organization and structural optimization of RBCC engine.