Experimental and numerical simulation of multi-component combustion of typical no-charring material

To predict the direct combustion of no-charring material, multiple pyrolysis gas components, which are closer to the real produced pyrolysis gases, are involved in the numerical simulation. The pyrolysis gas components are obtained by thermogravimetry coupled with fourier transform infrared spectroscopy experiments, and then several main components are chosen to be directly imported into the following combustion simulation considering a balance between the experimental complexity of measuring perfectly accurate gas components and simulation cost. Different from previous models based on only one assumed single component, the combustion and radiation models are improved for multiple components. The numerical simulation is conducted on a modified version of FireFOAM solver within the OpenFOAM toolbox, and the final predicted results agree well with experimental data of cone calorimeter. Due to the semi-transparent property of our current used no-charring material, the in-depth radiation is also considered in the pyrolysis model. Furthermore, our current simulated results are compared with that based on single component or without in-depth radiation model, and it is found that our results can better reproduce the experimental data, reducing the prediction deviations significantly.