engleski

Numerical modelling of radiative heat transfer and tabulated chemical kinetics in multiphase reactive processes

Radiative heat transfer plays a significant role in total heat transfer in industrial systems that operate at high temperatures. Therefore, this research aims to implement a spectral-line weighted-grey-gas model based on single grey gas and transparent window (SLW-1) to calculate the radiative absorption coefficient. The finite volume method for control volumes is applied to solve the radiative transfer equation. The SLW-1 model is validated using analytical results for simple geometries and experimental data from Sandia Flame D and internal combustion engines. Additionally, an automated procedure for efficiently calculating laminar flame velocity and the autoignition of an air-fuel mixture. The developed procedure for creating laminar flame speed and autoignition lookup databases employs the correlation functions for linking the existing data from a stable tabulation regime. The procedure is developed and implemented as a pre- processing tool of the computational fluid dynamic software based on the lognormal distribution for laminar flame speed in equivalence ratio direction and exponential functions for pressure, temperature, and exhaust gas recirculation directions. The implemented radiative absorption coefficient model and developed automated procedure provide more accurate and industrially feasible calculations of multiphase reactive processes.

Radiative heat transfer ; Radiative absorption coefficient ; Laminar flame speed ; Autoignition ; Emission ; Internal combustion engine

nije evidentirano