DESIGN AND CONSTRUCTION OF A REACTIVE TYPE MUFFLER FOR A FORMULA STUDENT VEHICLE

A Muffler is a noise controlling device that is utilized to reduce the sound formed by the exhaust gases pushed out from an IC engine. There are many types of mufflers based on engine speed, torque, and horse power. Upon Formula SAE guide lines the teams entering the event primarily aims to design and build a new exhaust system that will not exceed 100 dB and 110 dB at an idle speed and all supplementary speeds respectively. The secondary works aims to produce a system with an optimization in weight, cost and rise in overall engine performance. This paper work includes determining the dimensions of primary header tube and muffler, performing flow analysis by iterative trial and error technique and construction of a reactive type muffler for a formula student prototype vehicle using Stainless Steel tubes and Galvanised Iron sheets. Trialing found that muffler design 2 attenuates sound 86db and 101db at idle and supplement speeds respectively without creating much backpressure