In this paper, we investigate the functional acoustic performance of multi-chamber mufflers using a numerical approach. The wave propagation governing in expansion chamber domains is first introduced and solved by finite element method. Our results selected muffler configurations are compared with reference predictions model experiments order to validate present procedure. Then, influence geome...

This research aims to establish the effects of length activated carbon-based medium on exhaust gas emission and evaluate engine's corresponding performance. The method utilizes peat soil as source carbon. is dried then passed through a 30-mesh sieve. It further heated 400°C for an hour, soaked in 25-percent H2SO4 solution, maintained at 120°C oven. resulting carbon packed into absorbent tube wi...

Gas pressure regulators are widely used in gas transportation and distribution systems. They designed for deep reduction maintainance with high accuracy over a wide flow range. Operation at drop is accompanied by level of noise, which, silencers used. However, installation noise suppressor into the regulator design has significant impact on its static dynamic characteristics. This can lead to d...