OH Measurement in Propane Diffusion Flames by a Laser Induced Fluorescence Using a KrF Excimer Laser.
OH Measurement in Propane Diffusion Flames by a Laser Induced Fluorescence Using a KrF Excimer Laser.
复制标题
使用 KrF 准分子激光器通过激光诱导荧光测量丙烷扩散火焰中的 OH。
DOI：
10.1299/kikaib.65.1793
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Arai
中科院分区：
文献类型：
--
作者：
K. Hayashida;K. Amagai;M. Arai
采用激光诱导荧光法对丙烷扩散火焰中OH浓度进行了测量。用可调谐窄带KrF准分子激光器激发OH自由基的A（λ ′ = 3）<$X（ν"=0）带。通过分光镜测量来自火焰的诱导光的发射光谱。为了获得火焰中OH荧光的准确分布，从发射光谱中提取了OH荧光成分。我们称这种方法为光谱LIF（S-LIF）。比较了扩散火焰和预混火焰的诱导光光谱。虽然光谱只有OH荧光成分的情况下，预混火焰，高强度的发射从黄色火焰出现在LIF图像的情况下，扩散火焰。为了从LIF图像中去除高强度发射，从OH共振图像中扣除非共振图像作为背景图像。利用这种推导方法，尝试了平面激光诱导荧光（P-LIF）测量OH荧光的分布。比较了P-LIF和S-LIF测量的OH荧光分布。结果表明，P-LIF图像与S-LIF图像定性一致。
Laser induced fluorescence was applied for the measurement of OH concentration in the propane diffusion flames. A tunable, narrow band KrF excimer laser was used to excite the A(ν'=3)←X(ν"=0) band of OH radical. An emission spectrum of the induced light from the flames was measured by a spectroscope. An OH fluorescence component was picked up from the emission spectrum in order to obtain the accurate distribution of OH fluorescence in the flames. We call this method for spectrum-LIF (S-LIF). The spectrum of the induced light from the diffusion flames was compared with that of the premixed flames. Although the spectrum had only OH fluorescence components in the case of premixed flames, high intensity emission from the yellow flame appeared on the LlF image in the case of diffusion flames. To remove the high intensity emission from the LIF image, off resonance image was deducted from the OH resonance image as the background image. Using this deduction method, a planer laser induced fluorescence (P-LIF) was tried to measure the distribution of OH fluorescence. OH fluorescence distribution measured by P-LIF was compared with that of S-LIF. As the result, the P-LIF image qualitatively agreed with the data of S-LIF.