Design Optimization of Vehicle Muffler Transmission Loss using Hybrid Method

Cherng, John G.; Wu, Weiwei; Ding, Peiran; Hebbes, Mike; Zhang, Henry

doi:10.4271/2015-01-2306

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…The third kind is a reflective and absorptive mix. For all ranges of frequencies, we may use a hybrid muffler [Cherng et al 2015]. The goal of this research is to perform a reliable analysis on three main design parameters of the Formula race car muffler, i.e., partition position, variance in chamber volume, and the efficacy of perforated pipe within a hybrid muffler.…”

Section: Introductionmentioning

confidence: 99%

A comparison between hybrid method technique and transfer matrix method for design optimization of vehicle muffler

Mohamad¹,

Jalics²,

Zelentsov³

et al. 2021

FME Transactions

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Hybrid mufflers are now commonly equipped to decrease vehicle noise and are a crucial tool for regulation of the acoustic system. In order to ensure optimum engine efficiency, the system is intended to dump the strength of the acoustic pulses generated from the engine, and the back pressure created by these systems must be held to a minimum. Typically, modern mufflers have a complex structure of chambers and flow paths. There are a number of mechanisms for sound dampening that operate to silence the sound flowing through a muffler and piping device. This research introduces an important approach to optimize the transmission loss of hybrid muffler Formula student race car (FS) by using both experimental and analytical methods. For this analysis, two methods of calculation were chosen. The muffler has a complex partition located within the muffler chamber, which is a perforated pipe. For the creation of the Finite Element Analysis (FEA) model in AVL BOOST solver and another commercial advanced design software, the muffler CAD file was developed. Experimental measurements using a two-load method validated the FEA model. Reliable tests were conducted to verify the design parameters and optimize the muffler's transmission loss (TL) after the model was checked. The findings of experimental and machine analysis are included in the paper. For different measurement methods, recommendations are made for achieving optimum transmission loss curves.

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Section: Introductionmentioning

confidence: 99%

A comparison between hybrid method technique and transfer matrix method for design optimization of vehicle muffler

Mohamad¹,

Jalics²,

Zelentsov³

et al. 2021

FME Transactions

View full text Add to dashboard Cite

show abstract

“…The design of a muffler plays an important role in the overall Noise, vibration and harshness (NVH) performance of a Formula race car. Generally, the control of both the level and quality of formula race car engine parts noise is a key aspect of the design process of a new engine powertrain system, in order to satisfy the legislation limits and provide a characteristic exterior sound [1]. In particular, the gas dynamic noise is radiated from the engine intake and exhaust duct systems due to the highly unsteady flows in the pipes, originated by the periodic cylinder gas exchange process.…”

Section: Introductionmentioning

confidence: 99%

A hybrid method technique for design and optimization of Formula race car exhaust muffler

Mohamad

Jalics

Zelentsov

et al. 2020

International Review of Applied Sciences and Engineering

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In this work a multilevel Computational Fluid Dynamics (CFD) analysis has been applied for the design of a Formula race car exhaust muffler with improved characteristics of sound pressure level (SPL) and fluid dynamic response. The approaches developed and applied for the optimization process range from the 1D to fully 3D CFD simulation, exploring hybrid approaches based on the integration of a 1D model with 3D tools. Modern mufflers typically have a complex system of chambers and flow paths. There are a variety of sound damping and absorbing mechanisms working to quiet the sound flowing through a muffler and piping system. Two calculation methods were selected for this study. The muffler has a complex inner structure containing perforated pipe and fiber material. Computer-aided design (CAD) file of the muffler was established for developing Finite Element Analysis (FEA) model in AVL BOOST v2017 and another commercial advanced design software (SolidWorks 2017). FEA model was made to monitor the flow properties, pressure and velocity. After the model was verified, sensitivity studies of design parameters were performed to optimize the SPL of the muffler. The software analysis results are included in the paper. Recommendations are made for obtaining smoother SPL curves for various measurement methods.

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Investigation of the Combined Effect of Perforated Tube, Baffles, and Porous Material on Acoustic Attenuation Performance

Kumar¹,

Ravi²

2020

Advances in Automotive Technologies

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Design Optimization of Vehicle Muffler Transmission Loss using Hybrid Method

Cited by 5 publications

References 8 publications

A comparison between hybrid method technique and transfer matrix method for design optimization of vehicle muffler

A comparison between hybrid method technique and transfer matrix method for design optimization of vehicle muffler

A hybrid method technique for design and optimization of Formula race car exhaust muffler

Investigation of the Combined Effect of Perforated Tube, Baffles, and Porous Material on Acoustic Attenuation Performance

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