Institutional Repository of Coll Energy & Power Engn
Mitigation of radial exciting force of rotary lobe pump by gradually varied gap | |
Li, Yi-Bin1,2; Guo, Dong-Sheng1; Li, Xiao-Bin3 | |
2018-09-07 | |
发表期刊 | ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS |
ISSN | 1994-2060 |
卷号 | 12期号:1页码:711-723 |
摘要 | This paper presents a new structure of a rotary lobe pump cavity with gradually varied gap to mitigate the magnitude and fluctuation of the radial exciting force on the rotor. The geometry of the rotary lobe pump cavity is specially designed, so that the gap between the rotor and cavity is gradually changed during the rotors' engaging. The flow in this geometry is numerically studied, and its effect on the pressure pulsation and radial exciting force is analysed, based on the dynamic mesh and local mesh reconstruction. Also, the mechanism of the mitigation of radial exciting force is briefly discussed. The value of the gap is an addition of gradually varied gap r (0 approximate to r(max)) and the base gap (original constant gap: 0.2mm). As for the results, it is found that as the varied gap r(max) value increases, the intensity of the reverse rotating vortex at the outlet decreases, and the secondary flow pulsation of the outlet section is effectively weakened. When r(max)=0.1mm, the radial exciting force in the y-direction on the rotor is reduced by 12% comparing with the equal gap, and the radial exciting force pulsation coefficient is 0.31. Meanwhile, the radial exciting force in the x-direction is reduced by 19% accordingly. The gradually varied gap cavity can effectively reduce the peak value of the pressure pulsation at outlet, weakening the influence of the rapid change of the outlet pressure on the radial exciting force. It is found that an optimal r(max) of 0.1 approximate to 0.15mm has a remarkable effect on the mitigation of pressure pulsation and radial exciting force. |
关键词 | Rotary lobe pump pump cavity gradually varied gap radial exciting force flow pulsation numerically studied |
DOI | 10.1080/19942060.2018.1517053 |
收录类别 | SCI ; SCIE |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[51369015] ; National Natural Science Foundation of China[51866009] |
WOS研究方向 | Engineering ; Mechanics |
WOS类目 | Engineering, Multidisciplinary ; Engineering, Mechanical ; Mechanics |
WOS记录号 | WOS:000443987800001 |
出版者 | HONG KONG POLYTECHNIC UNIV, DEPT CIVIL & STRUCTURAL ENG |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/32457 |
专题 | 能源与动力工程学院 |
通讯作者 | Guo, Dong-Sheng |
作者单位 | 1.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou, Gansu, Peoples R China; 2.Key Lab Fluid Machinery & Syst, Lanzhou, Gansu, Peoples R China; 3.Sun Yat Sen Univ, Sinofrench Inst Nucl Engn & Technol, Zhuhai, Peoples R China |
第一作者单位 | 能源与动力工程学院 |
通讯作者单位 | 能源与动力工程学院 |
第一作者的第一单位 | 能源与动力工程学院 |
推荐引用方式 GB/T 7714 | Li, Yi-Bin,Guo, Dong-Sheng,Li, Xiao-Bin. Mitigation of radial exciting force of rotary lobe pump by gradually varied gap[J]. ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS,2018,12(1):711-723. |
APA | Li, Yi-Bin,Guo, Dong-Sheng,&Li, Xiao-Bin.(2018).Mitigation of radial exciting force of rotary lobe pump by gradually varied gap.ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS,12(1),711-723. |
MLA | Li, Yi-Bin,et al."Mitigation of radial exciting force of rotary lobe pump by gradually varied gap".ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS 12.1(2018):711-723. |
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