Effect of Length and Porosity on the Acoustic Performance of Concentric Tube Resonators
Veröffentlicht in 2015
The acoustic performance of an acoustically short Concentric Tube Resonator (CTR) is investigated to find an optimum porosity for a given length to diameter ratio. The study is motivated by the following practical difficulties encountered in automotive exhaust noise control: 1. Increasing trend of downsized engine and increase in power to weight ratio of engine for better fuel economy. 2. The need to reduce system weight (vehicle weight) for improving mileage. 3. Emergence of compact cars leads to reduction in package space and requires compact mufflers and CTRs for intake and exhaust noise control. 4. Limitations of 1D tools to analyze compact acoustic mufflers and CTRs.
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