Effect of Turbulance Created By Internally Threaded Inlet Manifold on the Performance of the Diesel Engine with Biodiesel Blends

It is believed that crude oil and petroleum products will become very costly and scarce. Fuel economy of engines getting improved and will continue to improve. With increased use and depletion of fossil fuels, alternative fuel technology will become more common. This led to the search for an alternative fuel which should be not only environment friendly but also sustainable without compromising on the performance. Many alternative fuels gave improved performance, specifically vegetable oil present a very hopeful alternative fuel for diesel oil because they are renewable, clean burning and having properties analogous to that of diesel. Here, in this study we use waste palm cooking oil (WPCO) as a biodiesel. The main problem related with the combustion in C. I. engine is to get the homogeneous mixture of fuel and air. Air motion in Compression Ignition engine influences the distribution and atomization of fuel injected into the combustion chamber. This research includes design and orientation of the inlet manifold, which is a major factor effecting the emissions and performance of the engine. Swirl greatly enhances the mixing of diesel and fuel to give better homogenous mixture within a short time. This paper aims at studying the performance and emission characteristics of a water cooled engine by directing the air flow with buttress threads in the intake manifold with waste cooking oil biodiesel blended with diesel in varying proportions on volume basis. Tests were carried out for pure diesel and biodiesel blends and various parameters such as brake power, fuel consumption and mean effective pressures are calculated. The test results indicate that blend B20 (20 % waste cooking oil & 80 % diesel) gives better performance and emission results compared to all fuel mixtures and diesel under this study.