The influence of rotational charge motion intensity on nitric oxide formation in gas-engine cylinder

There has been studied the influence of rotational number on the modification of local thermophysical features of working medium in the process of diesel combustion, converted into natural gas with spark ignition. Mathematic model, which is three-dimensional transient Reynold’s equations with addition of k–image turbulence model, is realized with the help of software complex FIRE. We analyze the results of numerical experiments, give the figures of transient local and average in volume features of working medium, such as turbulent kinetic energy, velocity, temperature. Local nitric oxide formation in the process of combustion is determined on the basis of Zeldovich’s expanded thermal mechanism. Comparative analysis of numerical research results at the design stage allows us to get optimal level of rotational charge motion intensity and ignition point, which improve ecological characteristics of the diesel at its conversion into gas engine with spark ignition.