Cfd Analysis of Stratified Scavenging in Two Stroke IC Engines

The civilization of any country depends on the number of vehicles used by the public. For heavy duties diesel engines are preferred while for individual transport a light duty two-stroke petrol engines are being employed. Two stroke engines have been around us for more than a century and have survived successfully because of their low power to weight ratio fewer parts and inexpensive However from the beginning two stroke engines have suffered from high emissions and poor fuel economy compared to the larger heavier but more efficient four stroke engines. The major pollutants emitted from these two-stroke engines are carbon monoxide and un-burnt hydro carbons. Hence globally stringent regulations are made for permissible levels of pollutants in the exhaust of two and four stroke spark ignition engines. Hydrocarbon emissions in two stroke engines are mainly due to short-circuiting of the fresh charge during scavenging process is a major source of pollution from the two-stroke spark ignition engines. In two-stroke internal combustion (IC) engines each outward stroke of the piston is a power stroke.combustion turbulence are modeled and studied using CFD.