Effect Of Hydrogenation On Electrical Properties Of Methane Laminar Flames In Positive Quenching State

China is at an important stage of economic transformation,so it also faces challenges and difficulties in a series of transitional stages.The importance of efficient and safe use of energy is becoming more and more important.According to the International Energy Agency's forecast,China's demand for energy will continue to increase.It is expected that China's energy consumption will surpass that of the United States in 2035,making it the world's largest energy consumer.At present,the widespread use of fossil fuels around the world has caused many crises,including energy shortage crisis and environmental pollution problems,so the promotion and use of clean energy has become increasingly important.The combustion process of energy in different burners is also different.For micro-scale burners,although the combustion process has the advantage of greater energy and power,it also faces the disadvantage of unstable combustion and prone to flame quenching.The distribution of free radicals,charged particles and electrons during flame quenching can produce significant changes.Therefore,studying the electrical properties under flame quenching has a certain guiding effect on weakening quenching and improving combustion stability and efficiency.The paper studied the effect of hydrogenation on the electrical properties of the methane laminar flame before it was quenched.In the experimental study of hydrogenation on the electrical properties of flame,the theoretical analysis of the electrical properties of the flame was first carried out.Combined with the characteristics of heat loss and free radical distribution in flame combustion,the material,voltage and hydrogen content of different plates were analyzed.The influence of hydrogenation on the electrical properties of methane flame under different working conditions such as air volume,using a current meter to measure a series of instantaneous current values under different conditions and plotting them into different graphs,and found that the plates have different materials for the current in the experimental results.The influence of the value is negligible,and the negative voltage of the burner has a great influence on the current value in the experimental results.In addition,different hydrogen doping amount and air amount will have different effects on the current value in the experiment.The most suitable current value in this experiment is 50ml/min.The addition of hydrogen can change the structure of the flame.The increase of the air volume will change the flame shape,which will increase the current in the experiment,but in the same form of fname.Under the air,the increase in the amount of air has little effect on the change in the peak value of the current.In addition,the increase in the amount of air causes the distance corresponding to the current peak to gradually decrease.In the numerical simulation of the study,the appropriate mathematical model and the ionization mechanism involved in the combustion process are first selected and the physical model is established,followed by the temperature and electrons of the flame.Free radicals and ions are simulated.The effects of hydrogen doping and air volume on temperature,electrons,free radicals and ion distribution were studied.It was found that selecting the appropriate amount of hydrogen and air to increase the concentration of electrons and free radicals and the change of electron concentration and the current in the experiment The changes are consistent,but the amount of hydrogen doping has a small effect on temperature,and the effects on different kinds of ions are also different.