Structure of the High-temperature in Premixed Turbulent Flames of Hydrogen-rich Gaseous Fuels
In this paper,the high-temperature structure in stretched turbulent flames of hydrogen-rich gaseous fuel are studied.The Laser Tomographic Visualization(LTV)and numerical simulation methods are used to quantitatively characterize the structural changes in the high-temperature re-gion in laminar and turbulent cases.The results show that the thickness of the high temperature zone in the flame increases with the increase of equivalent ratio.With the increase of the outlet flow rate,the strain rate of the flame is increase,and the thickness of the high temperature zone decreases.The laminar flame is relatively stable,so the position and shape of boundaries of the high temperature region are relatively steady.The turbulent vortexes will destroy the structure of the high temperature region,resulting in drastic fluctuations and bends of the high temperature boundary.With the increase of turbulence intensity,the thickness of flame high temperature zone also increases.Compared with the changing trend of flame high temperature zone boundary in high turbulence intensity and the energy spectrum analysis results,the results show that flame enters the Thin Reaction Zone(TRZ)combustion mode.
hydrogen-rich fuellaser tomographic visualizationpremixed turbulent flamescoun-terflow flameshigh temperature zone thickness
万方数据
维普
