CARS在超音速燃烧研究中的应用

Study of supersonic combustion by CARS measurement technique

报道了氮、氧和水的Q支CARS谱以及氢的S(5)和S(6 )纯转动CARS的测量结果 ,并用来确定超音速燃烧火焰中的温度及氢和氧的浓度 ;用水的Q支CARS谱得到共振与非共振谱积分面积比随浓度的变化曲线。提出并发展的同时测量氢和氧的CARS谱新方法 ,为同时测量火焰温度和氢、氧浓度提供了一条途径 ,特别对不含氮的燃烧系统更具重要意义。

The Q-branch CARS of N 2, O 2,H 2O and rota tional CARS of H 2(S(5) and S(6)) were measured and used to determining temper atures and concentrations of H 2 and O 2 in a supersonic combustion flame. The Q-branch CARS of H 2O were used to obtain the curve of area ratio of resonat and non-resonat CARS versus concentration. The new method of simultaneously measuring CARS of H 2 and O 2, which was developed in our laboratory, provides a way for simultaneously obtaining temperature and concentration of H 2 and O 2 in flame, especially for nitrogen free condition.