STUDY OF BACK PRESSURE IN CHAMBERED EXHAUST MUFFLER

Ch. Indira Priyadarsini; Madhav Modali

Volume : VI, Issue : IX, September - 2016

STUDY OF BACK PRESSURE IN CHAMBERED EXHAUST MUFFLER

Ch. Indira Priyadarsini, Madhav Modali

Abstract :

The essential function of an exhaust muffler is to facilitate the exhaust gases from the exhaust manifold while reducing the noise produced by the engine. Due to the twists and turns that the exhaust gas has to make to reach the atmosphere, there is a considerable amount of backpressure which restricts the free flow of the exhaust gases. It is necessary to reduce the backpressure as it enhances the fuel economy of the engine. The major concern for a designer is to ensure that the backpressure is minimum. This project deals with four different models of chambered exhaust muffler and concludes the best possible design for least pressure drop. SolidWorks 2014 version was used to design the exhaust mufflers. Virtual simulation for backpressure testing was performed by Computational Fluid Dynamic analysis using Flow Simulation of SolidWorks 2014. Heat balance test on single cylinder diesel engine was performed to know the mass flow rate of the exhaust gases. Flow trajectories are viewed to know the flow of exhaust gases through the muffler. The cut plots for pressure and exhaust gas velocity are viewed. Pressure drop is calculated across the exhaust muffler by viewing the pressure distribution. The findings are tabulated to conclude the best exhaust muffler.