Using the method of conservative scalars for the calculation of thermal radiation of turbulent diffusion flame

Data on laser probing of laboratory flames are used to quantitatively estimate the contribution made by turbulent fluctuations of thermodynamic parameters to thermal radiation of hydrogen diffusion flame. The coefficients in the equation of radiation transfer are averaged directly by samplings of instantaneous values of temperature and concentration; this helps eliminate errors associated with the use of model distribution functions. The obtained results are used to verify the approximate method for the calculation of thermal radiation of flame, which is based on the assumptions of thermochemical equilibrium of combustion and normal distribution of the coefficient of mixture.