电弧加热射流O_2激光诱导荧光技术温度测量

LIF temperature measurement of arcjet by O2-laser induced fluorescence

采用ArF准分子激光器作为激发光源来激励O2 Schumann Runge带系(B3Σ-u←X3Σ-g)193.3nm附近的转动吸收谱线,用紫外光电倍增管探测该带系256nm附近的荧光信号,建立了ArF准分子激光器O2激光诱导荧光流场测试系统。在建立O2单带测温模型和软件的基础上,利用Schumann Runge带系(10,2)带的荧光信号、测量了氧氩混合电弧加热射流的径向温度分布。结果表明:我们建立的ArF准分子激光器O2 LIF测试系统是成功的。

ArF excimer has been adopted to excite the absorption rot-vib lines near 193.3 nm for Schumann-Runge system (B3Σu-3Σg-) of O2 and the ultraviolet PMT has been used to detect the fluorescence near 256 nm to establish a set of Os-LIF flow field measurement system based on ArF excimer. On the basis of the single-band temperature measurement model established in this paper, we have measured the radial temperature distribution of oxygen and argon mixture arcjet by means of the fluorescence signal at the band (10,2) of O2 Schumann-Runge system. The experimental results show that the LIF measurement system based on ArF excimer has been established successfully.