Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel
Vertical jet in flowing water is a common phenomenon in daily life. To study the flow and turbulent characteristics of different jet orifice shapes and under different velocity ratios, the realizable <i>k</i>-<i>ε</i> turbulent model was adopted to analyze the three-...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/6/1505 |
| _version_ | 1798006439771373568 |
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| author | Hao Yuan Ruichang Hu Xiaoming Xu Liang Chen Yongqin Peng Jiawan Tan |
| author_facet | Hao Yuan Ruichang Hu Xiaoming Xu Liang Chen Yongqin Peng Jiawan Tan |
| author_sort | Hao Yuan |
| collection | DOAJ |
| description | Vertical jet in flowing water is a common phenomenon in daily life. To study the flow and turbulent characteristics of different jet orifice shapes and under different velocity ratios, the realizable <i>k</i>-<i>ε</i> turbulent model was adopted to analyze the three-dimensional (3D) flow, turbulence, and vortex characteristics using circular, square, and rectangular jet orifices and velocity ratios of 2, 5, 10, and 15. The following conclusions were drawn: The flow trajectory of the vertical jet in the channel exhibits remarkable 3D characteristics, and the jet orifice and velocity ratio have a significant influence on the flow characteristics of the channel. The heights at which the spiral deflection and maximum turbulent kinetic energy (TKE) occur for the circular jet are the smallest, while those for square jets are the largest. As the shape of the jet orifice changes from a circle to a square and then to a rectangle, the shape formed by the plane of the kidney vortices and the region above it gradually changes from a circle to a pentagon. With the increase in the velocity ratio, the 3D characteristics, maximum TKE, and kidney vortex coverage of the flow all gradually increase. |
| first_indexed | 2024-04-11T12:54:46Z |
| format | Article |
| id | doaj.art-2679c52509434ee69f4c38640a74d8c0 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:54:46Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2679c52509434ee69f4c38640a74d8c02022-12-22T04:23:05ZengMDPI AGEnergies1996-10732020-03-01136150510.3390/en13061505en13061505Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open ChannelHao Yuan0Ruichang Hu1Xiaoming Xu2Liang Chen3Yongqin Peng4Jiawan Tan5Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaChangjiang Chongqing Waterway Bureau, Chongqing 400074, ChinaSouthwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaSouthwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Shipping and Naval Architecture, Chongqing Jiaotong University, Chongqing 400074, ChinaVertical jet in flowing water is a common phenomenon in daily life. To study the flow and turbulent characteristics of different jet orifice shapes and under different velocity ratios, the realizable <i>k</i>-<i>ε</i> turbulent model was adopted to analyze the three-dimensional (3D) flow, turbulence, and vortex characteristics using circular, square, and rectangular jet orifices and velocity ratios of 2, 5, 10, and 15. The following conclusions were drawn: The flow trajectory of the vertical jet in the channel exhibits remarkable 3D characteristics, and the jet orifice and velocity ratio have a significant influence on the flow characteristics of the channel. The heights at which the spiral deflection and maximum turbulent kinetic energy (TKE) occur for the circular jet are the smallest, while those for square jets are the largest. As the shape of the jet orifice changes from a circle to a square and then to a rectangle, the shape formed by the plane of the kidney vortices and the region above it gradually changes from a circle to a pentagon. With the increase in the velocity ratio, the 3D characteristics, maximum TKE, and kidney vortex coverage of the flow all gradually increase.https://www.mdpi.com/1996-1073/13/6/1505orifice shapevertical jetvelocity rationumerical investigationhydraulic characteristics |
| spellingShingle | Hao Yuan Ruichang Hu Xiaoming Xu Liang Chen Yongqin Peng Jiawan Tan Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel Energies orifice shape vertical jet velocity ratio numerical investigation hydraulic characteristics |
| title | Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel |
| title_full | Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel |
| title_fullStr | Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel |
| title_full_unstemmed | Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel |
| title_short | Numerical Investigation of Vertical Crossflow Jets with Various Orifice Shapes Discharged in Rectangular Open Channel |
| title_sort | numerical investigation of vertical crossflow jets with various orifice shapes discharged in rectangular open channel |
| topic | orifice shape vertical jet velocity ratio numerical investigation hydraulic characteristics |
| url | https://www.mdpi.com/1996-1073/13/6/1505 |
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