Indian Journal of Science and Technology

Abstract

This project aims at evaluating the distribution of back pressure along the length of the effect of back pressure on fuel consumption of a carbureted SI engine. A baffle arrangement installed in the line from the manifold is used to alter the back pressure. The effect of baffle assembly (with four baffles of various angles) fitted at the silencer and the back pressure on the fuel consumption have been determined. Baffle assembly is helpful for the back pressure suppression and it causes change in fuel consumption. The models are analyzed using computational fluid dynamics software fluent for predicting the pressure drop across the muffler. The values of transmission loss and pressure drop is found for all the models and compared. The optimized design is selected from the model having more transmission loss and low pressure drop. The optimized model will be fabricated and tested by fitting in an internal combustion engine to evaluate the engine performance and pressure drop produced by the muffler.