Numerical modeling of processes in combustion chambers of automotive airbags

At present the numerical modeling is an effective tool for understanding in detail the complex physical-chemical processes in different technical devices. One of them is an airbag as part of modern automotive security systems. The present paper is devoted to numerical modeling of the combustion processes in a model airbag elaborated in ICT with two slots as output nozzles. The cause of it is spatial character of reaction product flow in combustion chamber and it is necessary to investigate the influence of structure of flow field on ignition and burning of propellant and booster granules. For modeling these processes the numerical algorithm has been developed. It takes into account non-uniform distribution of temperature in bulk of granules and allows to calculate the movement of burning products in regime of percolations. As a result there is the opportunity to predict the start of ignition and displacement of it in the framework of model burning with constant surface temperature rather realistic. The basis of the algorithm is the second-order upwind LU difference scheme with TVD-properties. For the covering abstract see ITRD E126782.