An Experimental Study on the Radiation Noise Characteristics of a Centrifugal Pump with Various Working Conditions

Chang Guo, Ming Gao, Dongyue Lu and Kun Wang
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Chang Guo: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Ming Gao: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Dongyue Lu: State Nuclear Power Engineering Company, Shanghai 200233, China
Kun Wang: School of Energy and Power Engineering, Shandong University, Jinan 250061, China

Energies, 2017, vol. 10, issue 12, 1-14

Abstract: To investigate the radiation noise characteristics of a centrifugal pump under various working conditions, a noise measurement system is established; afterwards, the distribution of different points and intervals, as well as the overall level of noise, are studied. The total sound pressure level distribution for different points manifests the dipole and asymmetric directivity characteristics. Additionally, the acoustic energy is introduced to compare the noise of different intervals to reveal the asymmetric characteristics, and it is found that variation in working conditions has little impact on the acoustic energy distribution, and the ratio of the acoustic energy in the direction facing the tongue, as well as that in the direction against the tongue, to total acoustic energy fluctuate around 0.410 and 0.160, respectively, under various working conditions. Also, the A-weighted average sound pressure level (L pA ) is applied to describe the overall level of noise, and L pA increases gradually with the growth of rotational speed, but the growth slope decreases. While in the operation of throttling regulation, L pA shows the trend that first increases, then remains stable, and increases again with the growth of flow rate. This study could provide guidance for optimizing the operating conditions and noise control of centrifugal pumps.

Keywords: centrifugal pump; radiation noise; distribution characteristic; acoustic energy; experimental research (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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