| Investigations into the unsteady internal flow characteristics for a waterjet propulsion system at different cruising speeds | |
Huang RF(黄仁芳)1; Ye WX2,5; Dai YX3; Luo XW2,5; Wang YW(王一伟)1,4 ; Du TZ(杜特专)1,4; Huang CG(黄晨光)1,4
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| Source Publication | OCEAN ENGINEERING
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| 2020-05-01 | |
| Volume | 203Pages:15 |
| ISSN | 0029-8018 |
| Abstract | Unsteady turbulent flows in a waterjet propulsion system are investigated at various cruising speeds with the emphasis on pressure fluctuations. The numerical methodology is based on the Reynolds-Averaged Navier-Stokes (RANS) equation with the SST k-omega turbulence model and a sliding mesh technique. The head and efficiency of the waterjet pump are predicted fairly well compared with the available experimental data. The pressure fluctuates intensively in the impeller and the dominant frequency is the impeller rotating frequency with the largest amplitude near the impeller inlet. Besides, two dominant frequency components exist in the intake duct and the diffuser. A high-frequency component is caused by the rotor-stator interaction, and another component is generated by the unsteady vortex evolution in the diffuser passage and would propagate upstream to the impeller and the intake duct. Analyses based on the vorticity transport equation demonstrate the great contribution of the vortex stretching term to the vorticity distribution and evolution in the diffuser. Finally, at the cruising speed of 45 knot, the flows inside the duct are strongly affected by the impeller rotation and present a periodic prewhirl motion with the dominant frequency of the impeller rotating frequency. |
| Keyword | Waterjet Waterjet propulsion Pressure fluctuation Numerical simulation |
| DOI | 10.1016/j.oceaneng.2020.107218 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000528188500019 |
| WOS Keyword | LARGE-EDDY SIMULATION ; NUMERICAL FLOW ; PERFORMANCE ANALYSIS ; CAVITATION |
| WOS Research Area | Engineering ; Oceanography |
| WOS Subject | Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography |
| Funding Organization | National Key R&D Program of China[2017YFC1404200] ; National Key R&D Program of China[2018YFB0606101] ; National Natural Science Foundation of China[51776102] ; National Natural Science Foundation of China[11772340] ; National Natural Science Foundation of China[11672315] ; National Natural Science Foundation of China[6142223190101] |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wang, Yiwei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/84784 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 2.Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China; 3.Sci & Technol Water Jet Prop Lab, Shanghai 200011, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 5.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Huang RF,Ye WX,Dai YX,et al. Investigations into the unsteady internal flow characteristics for a waterjet propulsion system at different cruising speeds[J]. OCEAN ENGINEERING,2020,203:15.Rp_Au:Wang, Yiwei |
| APA | 黄仁芳.,Ye WX.,Dai YX.,Luo XW.,王一伟.,...&黄晨光.(2020).Investigations into the unsteady internal flow characteristics for a waterjet propulsion system at different cruising speeds.OCEAN ENGINEERING,203,15. |
| MLA | 黄仁芳,et al."Investigations into the unsteady internal flow characteristics for a waterjet propulsion system at different cruising speeds".OCEAN ENGINEERING 203(2020):15. |
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| Jp2020228.pdf（12058KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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