Experimental Investigation of a Single Cylinder Diesel Engine with a Re-Entrant Chamber Using Diesel and Biodiesel Blend

摘要

The objective of this research work is to improve the performance of diesel engines and to reduce the emission levels using bio-diesel blended with diesel. From the literature it is revealed that the shape of the combustion chamber and the fuel injection timing have an impact on the performance, emission and combustion parameters of the Compression Ignition(CI) engine. In this work, a re-entrant combustion chamber in place of the conventional hemispherical combustion chamber is used it to carry out the experimental work. This work has been proposed to study the effect of combustion chamber geometry on the performance, emission and combustion characteristics. In this proposed work, the results were analyzed from the tests that were carried out in both the re-entrant chamber and the conventional chamber. The performance, emission and combustion characteristics were studied and the characteristics curves were drawn for both the diesel and bio-diesel blend. From the experimental results, it is found that the re-entrant chamber improves the brake thermal efficiency of diesel and J20 for all the tested conditions. Hydrocarbon (HC), Carbon Monoxide (CO) and smoke emissions were reduced, but Nitrogen Oxides (NOx) emissions were found to increase.