Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid
The intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid. Consistent geometry size o...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6688635 |
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| _version_ | 1832549182621089792 |
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| author | Can Luo Shuaihao Lei Chuan Wang Li Cheng Chenzhi Xia Di Zhang Qiang Guo |
| author_facet | Can Luo Shuaihao Lei Chuan Wang Li Cheng Chenzhi Xia Di Zhang Qiang Guo |
| author_sort | Can Luo |
| collection | DOAJ |
| description | The intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid. Consistent geometry size of the intake grid mentioned above is to be maintained to guarantee the identical flow capacity at the entrance of inlet duct. Using experimental and simulated method, the outcomes are drawn as below. Rather than the circular and rectangular intake grid, the streamlined intake grid can improve the hydraulic performance of the waterjet propulsion device. The numerical method is proved to be correct as the consistence of the hydraulic characteristic between the test and simulated results. The causes of hydraulic loss in the contraction segment and straight pipe segment are the intake grid and the inflow velocity, respectively; meanwhile, the loss in the belt pipe segment owes to the vortex, flow separation, and impact on the back. The intake grid has a positive effect on the depth of the inlet velocity profile, but a negative effect on the width of it. The intake grid installation results in thrust reduction, the progress of velocity-weighted average angle, and the regress of axial velocity uniformity. The performance of waterjet propulsion device is complex and evaluated by the hydraulic performance index (HPI), thrust performance index (TPI), and characteristic of flow pattern index (CFPI). Based on the three evaluation indexes, the streamlined scheme is raised to be the recommended scheme. |
| format | Article |
| id | doaj-art-981eaa12948d45268f18e820c30d1201 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-981eaa12948d45268f18e820c30d12012025-02-03T06:12:05ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66886356688635Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake GridCan Luo0Shuaihao Lei1Chuan Wang2Li Cheng3Chenzhi Xia4Di Zhang5Qiang Guo6College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, ChinaThe Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co, Ltd, Nanjing, Jiangsu 210019, ChinaCollege of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, ChinaCollege of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, ChinaThe intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid. Consistent geometry size of the intake grid mentioned above is to be maintained to guarantee the identical flow capacity at the entrance of inlet duct. Using experimental and simulated method, the outcomes are drawn as below. Rather than the circular and rectangular intake grid, the streamlined intake grid can improve the hydraulic performance of the waterjet propulsion device. The numerical method is proved to be correct as the consistence of the hydraulic characteristic between the test and simulated results. The causes of hydraulic loss in the contraction segment and straight pipe segment are the intake grid and the inflow velocity, respectively; meanwhile, the loss in the belt pipe segment owes to the vortex, flow separation, and impact on the back. The intake grid has a positive effect on the depth of the inlet velocity profile, but a negative effect on the width of it. The intake grid installation results in thrust reduction, the progress of velocity-weighted average angle, and the regress of axial velocity uniformity. The performance of waterjet propulsion device is complex and evaluated by the hydraulic performance index (HPI), thrust performance index (TPI), and characteristic of flow pattern index (CFPI). Based on the three evaluation indexes, the streamlined scheme is raised to be the recommended scheme.http://dx.doi.org/10.1155/2021/6688635 |
| spellingShingle | Can Luo Shuaihao Lei Chuan Wang Li Cheng Chenzhi Xia Di Zhang Qiang Guo Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid Shock and Vibration |
| title | Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid |
| title_full | Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid |
| title_fullStr | Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid |
| title_full_unstemmed | Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid |
| title_short | Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid |
| title_sort | investigation of complex characteristics of waterjet propulsion device with intake grid |
| url | http://dx.doi.org/10.1155/2021/6688635 |
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