CFD Simulation in Direct Diesel Engine with Different Combustion Chamber for NOX Reduction

Direct Injection (DI) diesel engines have taken a prominent place in public and private transport. Emissions of the diesel engine emissions Carbon monoxide (CO), Hydro Carbon (HC) have been effectively controlled with improvement in engine design. However Nitrogen Oxides (NOX) and soot are still a matter of concern for the engineers. The main objective of the present work is to reduce NOX emission in DI diesel engines. In this work, an attempt is made to the influence of engine operating parameters on Nitric Oxide (NO) emissions using a Computational Fluid Dynamic (CFD) code. STAR-CD, a 3-dimensional (3-D) CFD code based on finite volume method has been used for this purpose, which is capable of solving 3-D unsteady turbulent flows, sprays and combustion of IC engines. A four-stroke single cylinder Compression Ignition (CI) engine fitted with spherical bowl-in-piston for which CFD analysis carried. Though CFD code has the capability to solve complex in-cylinder fluid problems it is always necessary to validate output results of the code. Finally simulation analysis is extended to various engine parameters that influence on NO formations. In this sequence, first the effect of piston bowl configurations on in-cylinder fluid dynamics and pollutant formations are studied.