Study On The Measurement Method Of Planar Laser Induced Fluorescence For Hydroxyl Group In Bunsen Flame

Propulsion technology is key to the development of aerospace vehicle researchand development, and the combustion is the most important link in the propulsiontechnology. Planar laser induced fluorescence (PLIF) can obtain thetwo-dimensional distribution information of the combustion state. It is a importantmethod for combustion diagnosis.It can be seen in the progress research and application of PLIF, the applicationof PLIF has become more mature, but for the PLIF detection, SNR problem hasbeen the lack of in-depth research. This paper mainly studies on the OH-PLIF ofBunsen flame and its signal-to-noise ratio. Firstly, background and the the currentdevelopment of PLIF was introduced. Then it is analysised of the theory of laserinduced fluorescence an Bunsen flame. Through the PLIF system, OH baseddistribution on the Bunsen flame under different conditions was detected, the resultsof the experiment was contrast with the theoretical analyses, verify the accuracy ofOH-PLIF detection. And the OH-PLIF image of Bunsen flame under different laserenergy and different detection door wide was taken, to study the relationship of laserenergy/detection door wide and the SNR.