Namely the interplay between fluid flow pattern and flame propagation is entirely invariant as regards fuel variation indicating that the flame propagation through unburned mixture of CH4 and C8H18 fuels is not chemically controlled. Dont know who had what and when, but 100 years ago this year, Peugeot built and raced a 4-valve, DOHC engine. Namely the interplay between fluid flow pattern and flame propagation is invariant as regards turbulence models and fuels applied. In the case of combustion all differences ensuing from different turbulence models, obvious for non-reactive flows are annihilated entirely. Beginning in 1912, Stutz used four-valve engines, 4 conceptually anticipating modern car engines. In this paper flame propagation results were analyzed and presented for two different hydrocarbon fuels, such as CH4 and C8H18, for both turbulence models applied. The Peugeot Grand Prix car of 1912 and the Alfa Romeo Grand Prix car of 1914 were both four-valve engines, and Daimler and Riley were also using hemispherical combustion chambers at the time. standard k-ε model of turbulence and k-ξ-f model of turbulence. In the case of turbulence two different models were applied i.e.
Results presented are only a small part of broader on-going scrutinizing activity in the field of multidimensional modeling of reactive flows in combustion chambers with complicated geometries encompassing various models of turbulence, different fuels and combustion models. Flame propagation was represented by the evolution of spatial distribution of temperature in various cut-planes within combustion chamber while the flame front location was determined by dint of zones with maximum temperature gradient. In this paper some results concerning flame propagation of various fuels in a particular combustion chamber with four tilted valves were elucidated.
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