Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation
Zhang, Renhui1,2; Guo, Guangqiang1
2020-01
Source PublicationVACUUM
ISSN0042-207X
Volume171
AbstractTo study the gas-liquid flow in liquid-ring vacuum pump and its vibration characteristics, the test system was developed for flow visualization and vibration monitoring. The flow structure was captured by high-speed camera, and the vibration sensors were mounted on the bearing house and the pump casing respectively. The study shows that the vibration amplitude trends of the bearing house and pump casing are both a quadratic curve during start-up period, and the vibration amplitude of the pump casing is closely related to the unstable gas-liquid interface. With the increase of impeller rotation speed, more and more bubbles penetrate to the liquid ring, and the wakes are becoming more intense. Under different operating conditions, the main vibration of pump casing is highly relevant to the transient gas liquid flow. The main characteristic frequencies vibration of the bearing house is caused by mechanical resonance. The vibration level of the bearing house is significantly higher than the pump casing at all conditions. The vibration level of the pump casing increases with the decrease of flow rate and the increase of rotation speed for the transient flow. The vibration level of the bearing house reaches the maximum when the rotation frequency is consistent with the natural frequency.
KeywordLiquid-ring vacuum pump Gas-liquid two-phase flow Flow visualization Vibration characteristics Experimental study
DOI10.1016/j.vacuum.2019.109025
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFB0200901] ; National Natural Science Foundation of China[51979135]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000502894000031
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64150
Collection能源与动力工程学院
Corresponding AuthorGuo, Guangqiang
Affiliation1.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
2.Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationColl Energy & Power Engn
Corresponding Author AffilicationColl Energy & Power Engn
First Signature AffilicationColl Energy & Power Engn
Recommended Citation
GB/T 7714
Zhang, Renhui,Guo, Guangqiang. Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation[J]. VACUUM,2020,171.
APA Zhang, Renhui,&Guo, Guangqiang.(2020).Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation.VACUUM,171.
MLA Zhang, Renhui,et al."Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation".VACUUM 171(2020).
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