A Study of a Dual Mode Muffler

Liu, Benzhu; Maeno, Masahiro; Hase, Shuichi; Wakamatsu, Shigeki

doi:10.4271/2003-01-1647

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…The silencer inlet is set by Velocity boundary condition, the size of Velocity is 5.0 m / s, outlet is set to pressure boundary conditions for the atmospheric pressure outlet boundary. Finally, numerical analysis carried out until convergence with k-ε turbulence model [6] [7].…”

Section: Silencer Flow Field Simulationmentioning

confidence: 99%

Study on the Flow Characteristics of the Monolithic Muffler in Train Air Conditioning Duct

Dong

et al. 2012

AMR

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After installing the monolithic muffler in the train air duct, noise is reduced, but meanwhile also increased the air duct resistance. In this paper, a monolithic muffler simulation calculation model is introduced in this paper. The pressure loss and internal flow field of the muffler are obtained by. CFD simulation. Experimental results validate the simulation method. It provides a basis for the silencer performance research of muffler.

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Section: Silencer Flow Field Simulationmentioning

confidence: 99%

Study on the Flow Characteristics of the Monolithic Muffler in Train Air Conditioning Duct

Dong

et al. 2012

AMR

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“…The engine power loss due to such a conventional passive exhaust muffler system is known to be at least 10% [1] and [6]. Dual mode mufflers [7] and reactive mufflers with various internal configurations [5] have been proposed to reduce the problems caused by the high backpressure of conventional mufflers, but with only limited success. To overcome this problem, active noise control (ANC) systems were developed.…”

Section: Introductionmentioning

confidence: 99%

A Muffler with Adaptive Acoustic Properties

Šteblaj

Čudina

Lipar

et al. 2015

SV-JME

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“…1 The engine power loss due to the conventional passive exhaust muffler system is known to be at least 10%. 2 To reduce the problems caused by high backpressure of conventional mufflers, various attempts, such as the dual mode muffler 3 or reactive muffler with various internal configurations, 1 have been tried, but with only limited success. ANC is often applied in various situations for suppressing unwanted noise.…”

Section: Introductionmentioning

confidence: 99%

Adaptive muffler based on controlled flow valves

Šteblaj

Čudina

Lipar

et al. 2015

The Journal of the Acoustical Society of America

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An adaptive muffler with a flexible internal structure is considered. Flexibility is achieved using controlled flow valves. The proposed adaptive muffler is able to adapt to changes in engine operating conditions. It consists of a Helmholtz resonator, expansion chamber, and quarter wavelength resonator. Different combinations of the control valves' states at different operating conditions define the main working principle. To control the valve's position, an active noise control approach was used. With the proposed muffler, the transmission loss can be increased by more than 10 dB in the selected frequency range.

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A Study of a Dual Mode Muffler

Cited by 9 publications

References 1 publication

Study on the Flow Characteristics of the Monolithic Muffler in Train Air Conditioning Duct

Study on the Flow Characteristics of the Monolithic Muffler in Train Air Conditioning Duct

A Muffler with Adaptive Acoustic Properties

Adaptive muffler based on controlled flow valves

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