Study on the aerodynamic noise of internal flow of regenerative flow compressors for a fuel-cell car

Kang, Qiang; Zuo, Shuguang; Wei, Kaijun

doi:10.1177/0954406213500746

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…When the compressor works in transient conditions, it produces a whoosh noise with a frequency of 1-3 kHz. 1 A reactive muffler is widely used to attenuate the noise of vehicles and other venting systems. [2][3][4] Acoustic behaviour is one of the main indices to evaluate the performance of a muffler.…”

Section: Introductionmentioning

confidence: 99%

Acoustic behaviour analysis and optimal design of a multi-chamber reactive muffler

Xiang

Zuo

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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A two-dimensional analytical approach is developed to study the acoustic behaviour of a multi-chamber reactive muffler. The value of the transmission loss is obtained by matching the acoustic pressure and the particle velocity across the interfaces between different domains in the muffler. The analytical approach is validated by experimental results. Unlike the transfer matrix method, with this approach the acoustic behaviours can be studied above the first cut-off frequency of the muffler. Next, the effects of several structural parameters on the transmission loss value are invetigated, including the radii of the baffle holes, the inlet and the outlet, as well as the lengths and the radii of the expansion chambers. The variations in these parameters lead to quite large changes in the value of the transmission loss of the multi-chamber reactive muffler. Then, these parameters are chosen as the variables for the optimal design of the muffler, where the objective is the average transmission loss value between 1000 Hz and 3000 Hz. The results show that the objective value increases from 23.3 dB to 54.9 dB during optimization. The analytical approach in this paper can be used for analysis and optimization of the multi-chamber reactive muffler to reduce the noise effectively and efficiently in various applications.

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Section: Introductionmentioning

confidence: 99%

Acoustic behaviour analysis and optimal design of a multi-chamber reactive muffler

Xiang

Zuo

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Aerodynamic noises caused by the rear view mirror will also become an important part of vehicle noises. How to reduce the aerodynamic noise during high-speed running has become a studied hot topic [1][2][3][4]. Noises caused by running airflows include: noises caused when air enters a vehicle through door windows; aerodynamic noises caused by vortexes which are generated when airflows get contact with the body, as well as vibration noises caused by friction between air and the body; vibration noises caused by convex structures on the body.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and experimental test on aerodynamic noises of the bionic rear view mirror in vehicles

Wan¹,

Ma²

2017

J. vibroeng.

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At present, there are some researches focusing on optimization of aerodynamic noises on rear view mirrors, but researches on bionic noise reduction of rear view mirrors are rarely reported. Therefore, with an original rear view mirror as the basic model, the paper applied a head convex hull of a dung beetle to the original rear view mirror cover to obtain a bionic rear view mirror, then conducted numerical computation for aerodynamic noises of the bionic rear view mirror and compared the computational results with the original model. Finally, in order to verify correctness of computational results of aerodynamic noises of the rear view mirror, wind tunnel test was conducted on the rear view mirror. Experimental and numerical simulation results were highly consistent in the whole frequency band, so the wind tunnel test could be replaced by numerical simulation. Only one obvious vortex was behind the bionic rear view mirror, but two obvious vortexes with the opposite rotation directions were behind the original rear view mirror. The bionic rear view mirror did not present vortexes near the lateral window, so impacts of vortexes on noises in the vehicle could be eliminated effectively. Pressure difference in front of and behind the bionic view mirror was smaller than the pressure difference in front of and behind the original rear view mirror. Pressure resistance caused by the convex structure outside the rear view mirror was reduced, so noise reduction could be promoted. The convex structure mainly affected the aerodynamic noise in mid-high frequency regions. Compared with the original rear view mirror, noise reduction effects of the bionic rear view mirror were obvious, where the noise reduction amplitude reached 10dB. Noise source size and intensity of the bionic rear view mirror were reduced obviously.

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“…The blower is one of the main noise sources of the fuel cell vehicles 1 . The blower noise energy mainly lies on medium to high frequency and changes with the working conditions of the blower.…”

Section: Introductionmentioning

confidence: 99%

Study of micro-perforated tube mufflers with adjustable transmission loss

Xiang¹,

Zuo²,

Zhang³

et al. 2014

Proceedings of Meetings on Acoustics

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Study on the aerodynamic noise of internal flow of regenerative flow compressors for a fuel-cell car

Cited by 9 publications

References 20 publications

Acoustic behaviour analysis and optimal design of a multi-chamber reactive muffler

Acoustic behaviour analysis and optimal design of a multi-chamber reactive muffler

Numerical investigation and experimental test on aerodynamic noises of the bionic rear view mirror in vehicles

Study of micro-perforated tube mufflers with adjustable transmission loss

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