Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem
A series of experimental tests on flow-induced motion (FIM) and energy conversion of two rigidly coupled triangular prisms (TRCTP) in tandem arrangement were conducted in a recirculating water channel with the constant oscillation mass <i>m<sub>osc</sub></i>. The incoming flo...
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2022-11-01
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| Online Access: | https://www.mdpi.com/1996-1073/15/21/8190 |
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| author | Jijian Lian Zhichuan Wu Shuai Yao Xiang Yan Xiaoqun Wang Zhaolin Jia Yan Long Nan Shao Defeng Yang Xinyi Li |
| author_facet | Jijian Lian Zhichuan Wu Shuai Yao Xiang Yan Xiaoqun Wang Zhaolin Jia Yan Long Nan Shao Defeng Yang Xinyi Li |
| author_sort | Jijian Lian |
| collection | DOAJ |
| description | A series of experimental tests on flow-induced motion (FIM) and energy conversion of two rigidly coupled triangular prisms (TRCTP) in tandem arrangement were conducted in a recirculating water channel with the constant oscillation mass <i>m<sub>osc</sub></i>. The incoming flow velocity covered the range of 0.395 m/s ≤ <i>U</i> ≤ 1.438 m/s, corresponding to the Reynolds number range of 3.45 × 10<sup>4</sup> ≤ <i>Re</i> ≤ 1.25 × 10<sup>5</sup>. The upstream and downstream triangular prisms with a width of 0.1 m and length of 0.9 m were connected by two rectangular endplates. Seven stiffness (1000 N/m ≤ <i>K</i> ≤ 2400 N/m), five load resistances (8 Ω ≤ <i>R<sub>L</sub></i> ≤ 23 Ω), and five gap ratios (1 ≤ <i>L</i>/<i>D</i> ≤ 4) were selected as the parameters, and the FIM responses and energy conversion of TRCTP in tandem were analyzed and discussed to illustrate the effects. The experimental results indicate that the “sharp jump” phenomenon may appear at <i>L</i>/<i>D</i> = 2 and <i>L</i>/<i>D</i> = 3 significantly, with substantially increasing amplitude and decreasing oscillation frequency. The maximum amplitude ratio in the experiments is <i>A*<sub>Max</sub></i> = 2.24, which appears after the “sharp jump” phenomenon at <i>L</i>/<i>D</i> = 3. In the present tests, the optimal active power <i>P<sub>harn</sub></i> = 21.04 W appears at <i>L</i>/<i>D</i> = 4 (<i>U<sub>r</sub></i> = 12.25, <i>K</i> = 2000 N/m, <i>R<sub>L</sub></i> = 8 Ω), corresponding to the energy conversion efficiency <i>η<sub>harn</sub></i> = 4.67%. |
| first_indexed | 2024-03-09T19:06:09Z |
| format | Article |
| id | doaj.art-1eb6b514aff44b5f86ff7546dc27bcf3 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T19:06:09Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-1eb6b514aff44b5f86ff7546dc27bcf32023-11-24T04:33:13ZengMDPI AGEnergies1996-10732022-11-011521819010.3390/en15218190Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in TandemJijian Lian0Zhichuan Wu1Shuai Yao2Xiang Yan3Xiaoqun Wang4Zhaolin Jia5Yan Long6Nan Shao7Defeng Yang8Xinyi Li9School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaState Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300072, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaState Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300072, ChinaSchool of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, ChinaA series of experimental tests on flow-induced motion (FIM) and energy conversion of two rigidly coupled triangular prisms (TRCTP) in tandem arrangement were conducted in a recirculating water channel with the constant oscillation mass <i>m<sub>osc</sub></i>. The incoming flow velocity covered the range of 0.395 m/s ≤ <i>U</i> ≤ 1.438 m/s, corresponding to the Reynolds number range of 3.45 × 10<sup>4</sup> ≤ <i>Re</i> ≤ 1.25 × 10<sup>5</sup>. The upstream and downstream triangular prisms with a width of 0.1 m and length of 0.9 m were connected by two rectangular endplates. Seven stiffness (1000 N/m ≤ <i>K</i> ≤ 2400 N/m), five load resistances (8 Ω ≤ <i>R<sub>L</sub></i> ≤ 23 Ω), and five gap ratios (1 ≤ <i>L</i>/<i>D</i> ≤ 4) were selected as the parameters, and the FIM responses and energy conversion of TRCTP in tandem were analyzed and discussed to illustrate the effects. The experimental results indicate that the “sharp jump” phenomenon may appear at <i>L</i>/<i>D</i> = 2 and <i>L</i>/<i>D</i> = 3 significantly, with substantially increasing amplitude and decreasing oscillation frequency. The maximum amplitude ratio in the experiments is <i>A*<sub>Max</sub></i> = 2.24, which appears after the “sharp jump” phenomenon at <i>L</i>/<i>D</i> = 3. In the present tests, the optimal active power <i>P<sub>harn</sub></i> = 21.04 W appears at <i>L</i>/<i>D</i> = 4 (<i>U<sub>r</sub></i> = 12.25, <i>K</i> = 2000 N/m, <i>R<sub>L</sub></i> = 8 Ω), corresponding to the energy conversion efficiency <i>η<sub>harn</sub></i> = 4.67%.https://www.mdpi.com/1996-1073/15/21/8190triangular prismtandemflow-induced motionsharp jumpgap ratio |
| spellingShingle | Jijian Lian Zhichuan Wu Shuai Yao Xiang Yan Xiaoqun Wang Zhaolin Jia Yan Long Nan Shao Defeng Yang Xinyi Li Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem Energies triangular prism tandem flow-induced motion sharp jump gap ratio |
| title | Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem |
| title_full | Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem |
| title_fullStr | Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem |
| title_full_unstemmed | Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem |
| title_short | Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem |
| title_sort | experimental investigation of flow induced motion and energy conversion for two rigidly coupled triangular prisms arranged in tandem |
| topic | triangular prism tandem flow-induced motion sharp jump gap ratio |
| url | https://www.mdpi.com/1996-1073/15/21/8190 |
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