Research on the heat transfer characteristics of premixed flame impact quartz plate
MENG Lingcong
ZHANG Lili
CUI Yongzhang
DONG Haolin
Abstract：Based on the premixed flame experimental bench,the influence laws of three key parameters,namely the excess air coefficient,flame heat load and heating surface height,on the heat flux density distribution,heat flux distribution and thermal efficiency variation of the quartz plate are studied,and the temperature field on the surface of the quartz plate is collected by using an infrared thermal imager.The results show that when α is 0.5～0.8,the distribution of heat flux density along the radial direction shows a trend of first increasing and then decreasing.At this time,the peak of heat flux density occurs in the corresponding local high-temperature area.When α is between 0.9 and 1.1,the distribution of heat flux density shows a gradually decreasing trend.At this time,the peak of heat flux density occurs in the core high-temperature zone corresponding to the center position.The heat flux through the quartz plate increases with the increase of flame heat load,but the thermal efficiency decreases.When the height of the heating surface H is 15 mm and the flame heat load Qflame is 0.4 kW,the maximum thermal efficiency in the experiment is approximately 60%.
Keywords：premixed flame combustionheat flux density distributionheat fluxthermal efficiency
Publication Date：2026-01-31
Online Publishing Date：2026-03-11(First online date of this platform, not the publication date of the document)
Pages：5( 61-65 )