Transmission loss analysis of single-inlet/double-outlet (SIDO) and double-inlet/single-outlet (DISO) circular chamber mufflers by using Green’s function method

Banerjee, Subhabrata; Jacobi, Anthony M.

doi:10.1016/j.apacoust.2013.06.007

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…In addition, as exemplified in Figure 3, the simulated TL of a muffler having two inlets and one outlet was similar to the theoretical data by the green solution method [24]. erefore, the FEM model was correct.…”

Section: Model Checksupporting

confidence: 55%

Optimization of Screw Mufflers Equipped with Two Inlets and One Outlet Using Neural Network Model, Finite Element Method, and Genetic Algorithm

Chiu

Chang

Lan

et al. 2022

Mathematical Problems in Engineering

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Noise abatement by using efficient mufflers is compulsory, as venting noise, a type of huge noise in the industry, has a serious impact on human hearing. In order to reduce the noise abatement cost, the idea of using a muffler to suppress two kinds of venting noise sources arises. In this study, a muffler internally inserted with a screwed plate was proposed with two inlets and an outlet for exhaust venting. An analysis of the finite element method (FEM) was performed to estimate the muffler’s acoustical performance using the COMSOL program. A simplified objective function established by an artificial neural network (ANN) was trained to shorten the optimization procedure and linked to a genetic algorithm (GA). During the muffler analysis, both Rx (the outline dimension of the muffler) and D (the diameter of a straight and perforated tube) were chosen as design parameters. In addition, two target frequencies (1500 Hz and 2000 Hz) were specified during the optimization process. Consequently, the result reveals that the optimization of a screw muffler having two inlets and one outlet was efficiently assessed.

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Section: Model Checksupporting

confidence: 55%

Optimization of Screw Mufflers Equipped with Two Inlets and One Outlet Using Neural Network Model, Finite Element Method, and Genetic Algorithm

Chiu

Chang

Lan

et al. 2022

Mathematical Problems in Engineering

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show abstract

“…e muffling mechanism of these mufflers has been investigated in the literature [7][8][9][10][11][12]. If lowfrequency noise has to be eliminated, the expansion chamber of this type of muffler has to be long, requiring a large muffler.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Transmission Loss of a Side Outlet Muffler

Zhang

Shi

Zeng

et al. 2020

Shock and Vibration

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Vibration and noise reduction methods are important research directions in many industries. Mufflers are widely used in pipelines to reduce noise and vibration transmission. A theoretical analysis is conducted to determine the noise reduction mechanism of a muffler with a side outlet, and the results are verified with experiments. The quadrupole parameters of the muffler are obtained using transfer matrix analysis, and sensitivity analysis of the quadrupole parameters is conducted. The influence of the side outlet location on the transmission loss of the muffler is investigated experimentally using an impedance tube. The key factors affecting the transmission loss are analyzed. The theoretical calculation results of the transmission loss of the side outlet muffler are in good agreement with the experimental results.

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“…The research showed that when the cavity volume of the muffler was within a certain range, the acoustic attenuation performance would gradually enhance as the volume of the cavity increased. Banerjee and Jacobi 26 applied numerical matching and three-dimensional FEM to the muffler. The results showed that by setting the specific length of the cannon and the position of the inlet and outlet, the muffler’s passing frequency could be eliminated, thereby improving the muffler’s acoustic attenuation performance in the low frequency.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that by setting the specific length of the cannon and the position of the inlet and outlet, the muffler’s passing frequency could be eliminated, thereby improving the muffler’s acoustic attenuation performance in the low frequency. Banerjee and Jacobi 26 used finite element software ANSYS and acoustic software SYSNOISE to analyze the expansion muffler. It was found that the transmission loss of the muffler would increase in the middle- and low-frequency bands and the peak value would move to the low-frequency direction when the insertion length of the inner tube increased.…”

Section: Introductionmentioning

confidence: 99%

Muffler structure improvement based on acoustic finite element analysis

Zhang

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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Aiming to obtain the acoustic attenuation performance of exhaust muffler of diesel engine and the influence of main structural parameters on its acoustic attenuation characteristics, the finite element analysis method and acoustic theory were adopted to numerically investigate the acoustic attenuation performance under the boundary condition of acoustic adiabatic propagation and muffler wall. It suggested that the noise cancellation effect of muffler was poor at the middle and low frequency in range of 0-3000 Hz, and the transfer loss of muffler was basically 0 dB pass frequency at 1100 Hz. According to previous single-factor study experience, the structural factors, such as the expansion ratio, insertion length of outlet perforated pipe, the distance between the diaphragm and the front part of muffler, have influences on the acoustic performance of muffler at low frequency. Thus, they were taken as the starting point to study the influence of multiple interaction factors on the muffling performance by using orthogonal design method combined with the finite element analysis method. The influence degree of different structure parameters on the acoustic performance of muffler and the optimized structure parameters were obtained. Through the analysis on the acoustic characteristic of the optimized muffler, it indicated that the transmission loss of the improved muffler had significant increase in other frequency range except the range of 650-800 Hz and 2500-2700 Hz, especially at frequency of 1100 Hz compared with the original muffler. In the range of 0-3000 Hz, the mean of transmission loss of the improved muffler was about 9.8 dB larger than that of original muffler, which indicated that better noise cancellation effect was achieved. The improved muffler also provided a certain reference for the structural improvement of similar muffler.

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Transmission loss analysis of single-inlet/double-outlet (SIDO) and double-inlet/single-outlet (DISO) circular chamber mufflers by using Green’s function method

Cited by 14 publications

References 14 publications

Optimization of Screw Mufflers Equipped with Two Inlets and One Outlet Using Neural Network Model, Finite Element Method, and Genetic Algorithm

Optimization of Screw Mufflers Equipped with Two Inlets and One Outlet Using Neural Network Model, Finite Element Method, and Genetic Algorithm

Theoretical and Experimental Study on the Transmission Loss of a Side Outlet Muffler

Muffler structure improvement based on acoustic finite element analysis

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