Study On The Structure And Propagation Characteristics Of A Lean Combustion Hydrogen Air Premixed Turbulent Flame

In today's world,fossil fuels are getting scarcer and the natural environment is facing tremendous damage.As a clean and pollution-free energy source,hydro gen has received widespread attention.Therefore,it is of great potential for hydr ogen-powered equipment to provide power.In addition,lean burn Technology can improve the combustion efficiency of hydrogen internal combustion engines and also play a significant role in reducing nitrogen oxide emissions.The lean burn hydrogen-air premixed combustion has a slow propagation speed and turbulent pr emixed combustion is the key to its fast combustion.Therefore,the basic researc h on premixed combustion characteristics of lean-burn hydrogen-air turbulence ha s a far-reaching significance.The basic research of turbulent premixed combustion process has been carrie d out for several decades.However,turbulent environment is difficult to decoupl e turbulence and chemical interaction due to the complexity and randomness of t urbulent environment.Therefore,most scholars stay in the simple measurement o f flame image.Therefore,there are still some shortcomings in theoretical analysis and in-depth research on turbulence.Under the background of today's era and t he future of science and sustainable development,this paper gives a brief accoun t of the relationship between room temperature,initial pressure,turbulence intensi ty,Lean-burn hydrogen-air turbulence premixed flame combustion characteristics of further analysis,research,the main contents of this paper are as follows:First of all,the constant volume combustion experiment system is improved.Improves motor turbulence and sidewall flare during turbulence creation and enha nces the quality of shots high-speed photography.Effectively debugs and process es the extraction and calculation of basic parameters in a lean burn hydrogen-air turbulence premixed combustion flame image.Afterwards,the influencing factors on the structural characteristics of premix ed flame of lean-burn hydrogen-air turbulence were studied,and the characteristic s of lean-burn premixed flame instability in different turbulent atmosphere were s tudied.The effects of combusting equivalence ratio and turbulence intensity on t he influence law of the flame instability point of lean burn hydrogen-air premixe d flame was analyzed quantitatively.At the same time,the related research on flame propagation characteristics o f lean hydrogen-air turbulence premixed flame was carried out,and the influencing factors and variation rules of turbulent premixed flame propagation were anal yzed.Under different initial conditions,the law of lean-burn hydrogen-air turbule nce premixed flame propagation velocity and relative burning velocity with the fl ame radius were analyzed in detail,and the turbulent flow characteristics of pre-mixed flames of lean-burn hydrogen-air turbulence were revealed The influence mechanism was also studied.The accelerating index of turbulent premixed flame with lean burn hydrogen-air turbulence was studied.The acceleration exponent w as calculated and the change law of turbulence intensity with turbulence intensity was analyzed under normal temperature and pressure conditions.Finally,the theoretical calculation model of premixed flame combustion spee d for lean-burn hydrogen-air turbulence was studied,the experimental values wer e compared with theoretical model values of lean-burn hydrogen-air turbulent co mbustion velocity,and the correction factors were corrected,and the final verific ation correct the model's accuracy.