Planar laser-induced fluorescence(PLIF)can effectively identify the types of components,two-dimensional(2D)planar imaging of trace components in the flame and distribution measurment the temperature through the distribution of molecular vibration energy levels in the field of combustion research are obtained.Based on the two-color PLIF technology,a PLIF temperature measuring experimental system is established,with propellant combustion as the research object,two-color PLIF temperature measurement experiment is carried out by using Q2(11)and P1(7)in—OH,combing with the—OH based fluorescence images,the 2D temperature field distribution of flame is obtained.The 2D temperature field distribution is compared with the temperature measurement results of thermocouple and the error is analyzed.The comparison results show that the temperature measuring error of two-color PLIF temperature measurement technology is 12.2 K and the uncertainty is less than 5％.This method has the characteristics of non-contact and high sensitivity,and is suitable for the temperature measurement of steady-state combustion field.
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