Effect of Change in Diameter on Muffler Transmission loss using COMSOL

Bhadke, P. B.

doi:10.9790/1684-17010014146

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…Theoretically, the transmission loss characteristics will increase with the increase in the ratio of the resonator chamber to both inlet and outlet pipe cross-sectional area. [20]. Therefore, using equation 7, the transmission loss characteristics was calculated and the simulation results for the muffler without any variation of individual parameters presented in Figure 4.…”

Section: Comsol Multiphysics Simulation Analysismentioning

confidence: 99%

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Amuaku¹,

Asante²,

Edward³

et al. 2019

AAS

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Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.

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Section: Comsol Multiphysics Simulation Analysismentioning

confidence: 99%

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Amuaku¹,

Asante²,

Edward³

et al. 2019

AAS

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“…This module contain many sub-module, we solve this problems in the Pressure acoustics module. The physics interfaces play a vital role to couple with other physics interface in COMSOL5.2 Table 1 [10].…”

Section: The Theory Of Analysis On the Modelmentioning

confidence: 99%

Muffler Design with Baffle Effect and Performations on Transmission Loss

Kamarkhani

Kohan

2018

Mechanics and Mechanical Engineering

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A typical sound generated by vibrational waves is usually based on the experience and design experience, which can be enhanced by optimizing the internal structure of the exhaust system. The use of baffles and perforations has a significant effect on reducing the transmission loss in a silencer exhaust system. In order to evaluate the response effect of a silencer, the effect of baffle and perforations, without baffles and perforations, was evaluated in COMSOL5.2 software. Which results in numerical results with close experimental results and the effect of buffaloes and perforations, have shown a good reduction in transmissibility, and their partial differences are due to the features of geometry design.

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“…2 ) is to increase the cross-sectional area of the expansion chamber compared to the cross-sectional area of the inlet tube. This proportion is in reverse relation with the cut-off frequency, so with increasing expansion chamber diameter cut-off frequency will be shifted toward Lower frequencies and it leads to reduce the performance of the silencer in the frequency range [ 17 ]. Additionally, simple expansion chambers have other limitations such as an increase in pressure loss due to a sudden change in cross section area.…”

Section: Introductionmentioning

confidence: 99%

Study of acoustic and aerodynamic performance of reactive silencer with different configurations: Theoretical, modeling and experimental

Rahimi Jokandan,

safari variani,

Ahmadi

2023

Heliyon

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Effect of Change in Diameter on Muffler Transmission loss using COMSOL

Cited by 4 publications

References 10 publications

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Muffler Design with Baffle Effect and Performations on Transmission Loss

Study of acoustic and aerodynamic performance of reactive silencer with different configurations: Theoretical, modeling and experimental

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