Low Noise Intake System Development for Turbocharged I.C. Engines Using Compact High Frequency Side Branch Resonators

摘要: Turbochargers have become common in passenger cars as well commercial vehicles. They an excellent mechanism to effectively increase fuel efficiency and engine power, but they unfortunately cause several noise problems. Its are mainly classified structure-borne noises, generated from the vibration of rotating shaft modules (cartridges), air-borne air flow inside turbochargers or their coupling ducts. In this study attempt reduce pulsation compressor wheels, whose frequency is same whine presented. This based on using compact high side branch resonators develop low intake system. The design such system, which developed 1D linear acoustic theory theoretical investigations use more than one resonator connected main duct series and/or parallel introduced. An optimization strategy choose appropriate axis offset case complex unsymmetrical geometry real resonators, a 3 D finite element used. presented models validated via comparison with measured results at room temperatures. used improve performance resonators. Based results, internal improves its performance; serial arrangements damping peak while make it wider. amount extra added system depends can be around 50 dB peaks, 30 between peeks normal operating conditions. Extra improvement reduction achieved by redesigning optimizing entire under both space shape constrains.