Selection of Restrictor and Plenum Model of Muffler Using Finite Elemental Simulation

Abstract

This paper mainly focusing on the selection of the restrictor model and plenum model of the muffler. The restrictor model mainly used in formula student racing competition are held across the world coordinated by society of automotive engineers. In this competition rule to restrict the power which is delivered to the cylinder. Three different shapes (oval shape,cylinder and sphere shapes) are chosen for testing. So they restrict the 20mm air restrictor before reaching the cylinder. To eliminate the restrictor to minimizing the pressure difference between the intake and outlet. To achieved the convergent-divergent angles changed by 20mm diameter to find out the angle to get less pressure drop. In-order to acquire the results of convergent angle of 17? and divergent angle of 4? had less pressure drop so that it is useful in muffler. Among three, sphere shapes is performed less pressure drop than compared with other shapes.