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  • A muffler with adaptive acoustic properties
    Šteblaj, Peter ...
    Adaptive muffler upgrades the conventional muffler with a variable geometry to extend its working range. Adaptive muffler systems, described in the available literature, operate on the principle of ... controlling only single property of th e muffler to tune its working range. During the adaptation process of these systems the basic principle of operation is not changed. Based on the literature review, the question arises whether it would be possible to control the principle of operation. At one instant it would work as a Helmholtz resonator, in the other as an expansion chamber or side branch resonator. Analytical calculations provided a positive answer and a muffler with four active valves was designed and constructed to confirm the theoreti cal expectations. Properties of proposed muffler were simulated with Finite Element Method. Results of simulations were validated with measurements. Finally, simulations of proposed muffler, working at different operating conditions , were performed. Simula tio ns have shown that the proposed system allows tuning of the muffler to a wide working frequency range. Such approach to muffler design eliminates the need for additional mufflers used in IC exhaust systems. Therefore a smaller volume of the proposed muffler enables the same effect as multiple non-adaptive conventional mufflers.
    Vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 61, nr. 10, Oct. 2015, str. 553-560, SI 103)
    Vrsta gradiva - članek, sestavni del
    Leto - 2015
    Jezik - angleški
    COBISS.SI-ID - 14180635

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    Digitalna knjižnica Slovenije - dLib.si
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