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水力发电学报 ›› 2025, Vol. 44 ›› Issue (6): 89-97.doi: 10.11660/slfdxb.20250609

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水平射流泥沙冲刷对扑翼获能特性的影响

  

  • 出版日期:2025-06-25 发布日期:2025-06-25

Study on influence of horizontal jet sediment erosion on energy extraction performance of flapping hydrofoil

  • Online:2025-06-25 Published:2025-06-25

摘要: 为研究泥沙冲刷对扑翼获能特性的影响,本研究采用离散相模型建立了二维水平射流泥沙冲刷扑翼模型,分析了泥沙的直径、质量流量和流速对扑翼获能特性的影响。结果表明,当泥沙的直径为1 mm、质量流量为0.50 kg/s和流速为1 m/s时,扑翼的能量获取效率达到最大值44.92%,相比于Kinsey文献中计算的扑翼效率38.8%提升了6.12%。在泥沙冲刷过程中,扑翼与泥水相互作用增强,导致了压差增大,有利于推动扑翼的起伏运动。同时,泥沙冲刷也加速了尾迹涡脱落,翼尾缘扰动激烈,增强了扑翼从流体中捕获能量的能力,扑翼获能特性得到提升。

关键词: 泥沙冲刷, 离散相模型, 获能特性, 水平射流, 扑翼

Abstract: A two-dimensional horizontal jet sediment erosion model is developed using a discrete phase model, to study the influence of sediment erosion on the energy extraction characteristics of a flapping hydrofoil. The results show that for the sediment diameter of 1mm, at a mass flow rate of 0.50kg/s and a flow velocity of 1m/s, the hydrofoil’s energy extracting efficiency reaches its peak of 44.9%, or an increase of 6.1% compared to the Kinsey’s peak of 38.8%. In sediment-laden flow, interaction is enhanced between the flapping hydrofoil and muddy water, leading to an increase in pressure difference, which is conducive to the hydrofoil’s fluctuating movement. Sediment-laden flow also accelerates vortex shedding in the wake of the hydrofoil with fierce disturbance on the trailing edge, so that the capability of capturing flow energy is enhanced. Therefore, the energy extraction characteristics of a flapping hydrofoil is improved by sediment-laden flow.

Key words: sediment erosion, discrete phase model, energy extraction efficiency, horizontal jet, flapping hydrofoil

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