A Method for Improving the Measurement Accuracy of Rayleigh Scattering Temperature in Turbulent Flame Filter

Abstract

The invention discloses a method for improving the measurement accuracy of turbulent flame filtered Rayleigh scattering temperature, which is characterized in that it includes step 1) determining the plane of the flame to be measured, and placing the sheet laser in the filtered Rayleigh scattering system on the plane of the flame to be measured; 2) Determine the position of the reference temperature point of the measured flame plane, and place the temperature measuring point in the coherent anti-Stokes Raman spectroscopy system at the position of the reference temperature point; 3) Determine the position of the sheet laser in the filtered Rayleigh scattering system in the measured area Spatial intensity distribution; 4) Use the image collector to collect and record the filtered Rayleigh scattering two-dimensional plane image of the burning flame; 5) Use the image collector to collect and record the coherent anti-Stokes Raman spectral signal of the temperature reference point; 6) After Data processing obtains the temperature measurement results of coherent anti-Stokes Raman spectroscopy at the reference temperature point; 7) obtains the two-dimensional plane temperature distribution filter Rayleigh scattering measurement results of the measured flame plane through data processing. The method has high measurement accuracy, non-contact and strong operability.

Description

technical field [0001] The invention relates to the field of non-contact measurement of turbulent flame temperature, in particular to a method for improving the measurement accuracy of turbulent flame filter Rayleigh scattering temperature. Background technique [0002] Flame temperature is one of the most commonly used and most important physical quantities in combustion diagnosis research, and it is the most intuitive description of the combustion process. Measuring the flame temperature is very important for understanding the temperature distribution, exploring the physical process and chemical reaction mechanism, understanding the combustion process, evaluating the combustion efficiency, and then evaluating the overall combustion flame. With the deepening of combustion science and technology research, the combustion process is developing towards the direction of transient and high temperature, and the combustion process is mostly a complex turbulent flame, which puts for...

AI Technical Summary

Problems solved by technology

When these technologies are applied to the temperature measurement of high-temperature turbulent flames, there is a single-point measurement, and the results of the two-dimensional plane distribution of the temperature cannot be obtained at the same time, or the measurement accuracy is not high, and it is difficult to meet the requirements for accurate measurement of the two-dimensional plane distribution of the turbulent flame temperature.

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