Hydrodynamic Study on Energy Capturing Performance of Horizontal Axis Blades Under Sub-Low Speed Tidal Current

Rujun, Gao,; Chen, Junhua; Zhang, Junjie; Zhou, Si-Yu; Xu, Hua-fei; Wu, Junde; Qian, Xiaohua

doi:10.1007/s13344-020-0034-4

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Laurens et al [3] designed a blade approaching the Bates limit on the basis of the blade momentum theory for wing sections. Gao et al [4] investigated the performance of tidal current energy capture at low flow velocities by designing a composite blade, hoping to make better use of energy in low-velocity sea areas to solve the problems of startup. Bangga et al [5] found that airfoil thickness is an important factor affecting the performance of rotors with high robustness.…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis and Experimental Study on Airfoil Optimization of Low-Velocity Turbine

Shen,

Zhang,

Ding

et al. 2024

JMSE

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By combining computational fluid dynamics (CFD) and surrogate model method (SMM), the relationship between turbine performance and airfoil shape and flow characteristics at low flow rate is revealed. In this paper, the flow velocity tidal energy airfoil model is designed based on the Kriging model, and the original airfoil with a relative thickness of 12% and a relative curvature of 2.5% is obtained. The parameter optimization is carried out by setting the 4th CST equations through the surrogate model; the maximum lift-drag ratio is the optimization goal, the optimization design variable is 10, the maximum number of iterations is 100, and the maximum number of sub-optimization iterations is 200. The results show that the hydrodynamic performance of the airfoil with thinner thickness and more curvature is better, the maximum thickness part is shifted forward by 4.58%, and the lift-drag ratio is improved by 4.03%. The flow field and the efficiency are more stable, which provides an engineering reference for the optimal design of hydraulic turbine airfoils under low flow velocity. It supplements the research on the performance of turbine blades in low velocity.

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Section: Introductionmentioning

confidence: 99%

Simulation Analysis and Experimental Study on Airfoil Optimization of Low-Velocity Turbine

Shen,

Zhang,

Ding

et al. 2024

JMSE

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“…Hydrofoil as a basic structural unit is frequently applied in ship and marine engineering to supply sufficient lift force or maneuvering control ability for ship and underwater structures as well as energy harvesting equipment, and so on. [1][2][3][4][5][6] The essential requirement of hydrofoil is to provide a wide range of lift force with a relative low drag resistance cost. Many attempts are devoted to improve and study the influence of such hydrodynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on drag reduction and wake modification for the flows over a hydrofoil in presence of surface heterogeneity

Kouser

Xiong

Yang

et al. 2022

Advances in Mechanical Engineering

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In this article, direct numerical simulations of flow around NACA0012 hydrofoil with superhydrophobic surface (SHS) is presented. Surface heterogeneity takes into account by periodic no-slip and shear-free grates on the surface. The study is conducted for a range of [Formula: see text] degree angles of attack and at fixed Reynolds number ( Re) 1000. SHS leads to effective Navier slip on the hydrofoil surface and corresponding changes in velocity profile. Bubble separation delays for higher gas-fraction ( G.F), and minimizes the vortex shedding effects. As a result, flow remains two-dimensional (2D) for higher angles of attack as compared to flow over three-dimensional (3D) hydrofoil with no-slip boundary. Both the drag reduction and enhancement of lift force are observed. Maximum lift are observed at [Formula: see text], while the drag force continues to decrease with the gradual increase in angle of attack and patterned micro-grates fraction. Mode C with smaller wavelength is observed at [Formula: see text]. Furthermore, increase in gas-fraction leads to increase in slip length which thickens the boundary layer and mimics the vorticity implies drag reduction. Thus, replacement of the no-slip surfaces by superhydrophobic surfaces can be treated as a promising drag reduction technology.

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An Adaptive Single Neural Control for Variable Step-Size P&O MPPT of Marine Current Turbine System

Wang

Zhou

et al. 2021

China Ocean Eng

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Hydrodynamic Study on Energy Capturing Performance of Horizontal Axis Blades Under Sub-Low Speed Tidal Current

Cited by 6 publications

References 29 publications

Simulation Analysis and Experimental Study on Airfoil Optimization of Low-Velocity Turbine

Simulation Analysis and Experimental Study on Airfoil Optimization of Low-Velocity Turbine

Numerical study on drag reduction and wake modification for the flows over a hydrofoil in presence of surface heterogeneity

An Adaptive Single Neural Control for Variable Step-Size P&O MPPT of Marine Current Turbine System

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