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Research Papers

Attenuation of Gas Pulsation in the Valve Chamber of a Reciprocating Compressor Using the Helmholtz Resonator

[+] Author and Article Information
Xiaohan Jia

School of Energy and Power Engineering,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an 710049, China

Boxiang Liu

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
No. 619, Yonghua North Street,
Baoding, Hebei Province 071003, China

Jianmei Feng

School of Energy and Power Engineering,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an 710049, China
e-mail: jmfeng@mail.xjtu.edu.cn

Xueyuan Peng

School of Energy and Power Engineering,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an 710049, China
State Key Laboratory of Multiphase Flow
in Power Engineering,
Xi'an Jiaotong University,
Xi'an 710049, China

Contributed by the Noise Control and Acoustics Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received March 29, 2013; final manuscript received May 28, 2014; published online July 25, 2014. Assoc. Editor: Lonny Thompson.

J. Vib. Acoust 136(5), 051002 (Jul 25, 2014) (8 pages) Paper No: VIB-13-1100; doi: 10.1115/1.4027790 History: Received March 29, 2013; Revised May 28, 2014

This paper presents testing and analysis results associated with a new control method based on the Helmholtz resonator to suppress the pressure pulsations in the valve chamber and cylinder nozzle of a reciprocating compressor. The characteristic response of the designed Helmholtz resonator was analyzed and its attenuation characteristics on the gas pulsation were investigated. A three-dimensional acoustic model of the gas pulsation was established by means of the finite element method (FEM) for a compressor discharge piping system with and without the resonator. The gas column natural frequencies of the piping system and the pressure wave profiles were predicted using the presented model and validated by comparing the simulated results with the experimental data. The results showed that the pressure pulsating amplitude in the valve chamber was reduced by 40.4% when the resonator was installed. If the resonance frequency of the resonator shifted from the cylinder nozzle characteristic frequency by a range of ±13%, the reduction in the pressure fluctuations within the valve chamber was about 24%. The best attenuation effectiveness on the valve chamber, a reduction of 47%, was obtained when two resonators were installed on the valve covers of both the head and crank ends. Two new frequencies of 40.4 Hz and 66.9 Hz appeared to replace the original cylinder nozzle characteristic frequency of 53.9 Hz with the Helmholtz resonator installation, and the corresponding resonance region was transferred from the valve chamber to the resonator.

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Figures

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Fig. 1

Discharge piping system and 3D model of the Helmholtz resonator

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Fig. 2

Physical model of the discharge piping system studied

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Fig. 3

Finite element meshes of the gas column in the piping system

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Fig. 4

Test rig of the discharge piping system

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Fig. 5

The characteristic frequency of the Helmholtz resonator

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Fig. 6

Comparison of simulated and measured gas column natural frequencies

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Fig. 7

Acoustic modes of the piping system at different frequencies

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Fig. 8

Pressure pulsation and amplitude–frequency characteristics in the piping systems

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Fig. 9

Comparison of the pressure fluctuation attenuation with and without the resonator

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Fig. 10

Pressure fluctuation in valve chamber (node 1) with the resonator's various resonance frequencies

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Fig. 11

Pressure fluctuation in valve chamber at different mean pressures

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Fig. 12

Pressure fluctuation in valve chamber at different rotational speeds

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Fig. 13

Pressure fluctuation in valve chamber with resonators installed at cylinder ends

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