ACOUSTIC POWER ANALYSIS FOR NOISE PREDICTION ON ENGINE OUTPUT SHELL USING CFD TO DECREASE THE POWER LEVEL OF ACOUSTIC

Abstract

Muffler is a part of exhaust system in I.C Engines which suppress the acoustic pulse generated by the combustion process. A high intensity pressure wave produced by combustion in the engine chamber spreads along the exhaust pipe and transmits from the exhaust pipe end. Exhaust mufflers are intended to decrease sound levels at specific frequencies. New guidelines and principles for noise emissions progressively compel the automotive firms to make some developments about diminishing the engine noise. On the other side, advancements on automobile innovation and expanding rivalry between producers, requires ability of higher sound absorption and lower back pressure mufflers with reduced weight. Lightness could be conceivable if the thickness is diminished or the volume is decreased. Be that as it may, this causes high back pressure. For the most part, muffler design has been an iterative
procedure by trial and error. In the scenario of world market, it is significant for an organization to shorten product development cycle time.

This paper with a analytical way to deal with design, create and approve muffler especially reactive muffler for exhaust system, which will give favourable circumstances over the regular technique with shorten product development cycle time and approval. This paper in like manner emphasis how present-day CAE tools could be utilized for leveraged for optimizing the overall system design adjusting conflicting prerequisites like Noise and acoustic power level.