| Numerical investigations of the energy performance and pressure fluctuations for a waterjet pump in a non-uniform inflow | |
Luo XW1; Ye WX1; Huang RF(黄仁芳)2; Wang YW(王一伟)2 ; Du TZ(杜特专)2; Huang CG(黄晨光)2
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| Corresponding Author | Huang, Renfang([email protected]) |
| Source Publication | RENEWABLE ENERGY
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| 2020-06-01 | |
| Volume | 153Pages:1042-1052 |
| ISSN | 0960-1481 |
| Abstract | As a way of exploitation and utilization of ocean energy, the waterjet pump is used in a wide range of high-speed marine vessels over 30 knot. This paper aims to investigate the mechanism of the energy loss and pressure fluctuations caused by the non-uniform inflow for a waterjet pump. Unsteady internal flows inside the waterjet pump are simulated using the Reynolds-averaged Navier-Stokes equations with the SST k-omega turbulence model. The predicted pump head and efficiency are in reasonable accordance with the experimental data. The inflow non-uniformity would decrease the hydraulic head, efficiency and increase the axial force fluctuations in the impeller, causing large pulsations in the unsteady energy performance. Based on analyses of the energy loss, the turbulent kinetic energy production and the diffusion of the Reynolds stress are major sources of the energy loss in the waterjet pump. The non-uniform inflow induces a dramatic energy loss in the intake duct and diffuser with an apparent flow separation observed near the trailing edge of the diffuser blade. Due to the inflow non-uniformity, the pressure fluctuates violently at the impeller rotating frequency (f(n)) in the intake duct, impeller and near the diffuser inlet, but a dominant frequency of 2f(n), is generated by the unsteady flow separation near the diffuser outlet. (C) 2020 Elsevier Ltd. All rights reserved. |
| Keyword | Waterjet pump Energy performance Pressure fluctuation Numerical simulation |
| DOI | 10.1016/j.renene.2020.02.081 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000536952200085 |
| WOS Keyword | TURBULENCE MODELS ; FLOW PUMP ; SIMULATION ; TURBINE ; DYNAMICS ; EQUATION |
| WOS Research Area | Science & Technology - Other Topics ; Energy & Fuels |
| WOS Subject | Green & Sustainable Science & Technology ; Energy & Fuels |
| Funding Project | National Key R&D Program of China[2018YFB0606101] ; National Natural Science Foundation of China[51536008] ; National Natural Science Foundation of China[11772340] ; National Natural Science Foundation of China[11672315] ; Beijing Natural Science Foundation[3182014] ; Tsinghua National Laboratory for Information Science and Technology ; Science and Technology onWater Jet Propulsion Laboratory[6142223190101] |
| Funding Organization | National Key R&D Program of China ; National Natural Science Foundation of China ; Beijing Natural Science Foundation ; Tsinghua National Laboratory for Information Science and Technology ; Science and Technology onWater Jet Propulsion Laboratory |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Huang, Renfang |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/82114 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Tsinghua Univ, Dept Energy & Power Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Luo XW,Ye WX,Huang RF,et al. Numerical investigations of the energy performance and pressure fluctuations for a waterjet pump in a non-uniform inflow[J]. RENEWABLE ENERGY,2020,153:1042-1052.Rp_Au:Huang, Renfang |
| APA | Luo XW,Ye WX,黄仁芳,王一伟,杜特专,&黄晨光.(2020).Numerical investigations of the energy performance and pressure fluctuations for a waterjet pump in a non-uniform inflow.RENEWABLE ENERGY,153,1042-1052. |
| MLA | Luo XW,et al."Numerical investigations of the energy performance and pressure fluctuations for a waterjet pump in a non-uniform inflow".RENEWABLE ENERGY 153(2020):1042-1052. |
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| Jp2020160.pdf（4450KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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