Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem

Jijian Lian, Zhichuan Wu, Shuai Yao, Xiang Yan, Xiaoqun Wang, Zhaolin Jia, Yan Long, Nan Shao (), Defeng Yang and Xinyi Li
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Jijian Lian: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Zhichuan Wu: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Shuai Yao: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Xiang Yan: State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300072, China
Xiaoqun Wang: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Zhaolin Jia: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Yan Long: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Nan Shao: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Defeng Yang: State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300072, China
Xinyi Li: School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China

Energies, 2022, vol. 15, issue 21, 1-20

Abstract: 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 m osc . The incoming flow velocity covered the range of 0.395 m/s ≤ U ≤ 1.438 m/s, corresponding to the Reynolds number range of 3.45 × 10 4 ≤ Re ≤ 1.25 × 10 5 . 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 ≤ K ≤ 2400 N/m), five load resistances (8 Ω ≤ R L ≤ 23 Ω), and five gap ratios (1 ≤ L / D ≤ 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 L / D = 2 and L / D = 3 significantly, with substantially increasing amplitude and decreasing oscillation frequency. The maximum amplitude ratio in the experiments is A* Max = 2.24, which appears after the “sharp jump” phenomenon at L / D = 3. In the present tests, the optimal active power P harn = 21.04 W appears at L / D = 4 ( U r = 12.25, K = 2000 N/m, R L = 8 Ω), corresponding to the energy conversion efficiency η harn = 4.67%.

Keywords: triangular prism; tandem; flow-induced motion; sharp jump; gap ratio (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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