Effect of Intake Vortex Occurrence on the Performance of an Axial Hydraulic Turbine in Sihwa-Lake Tidal Power Plant, Korea

Kim, Jin‐Hyuk; Heo, Man-Woong; Cha, Kyung-Hun; Kim, Kwang‐Yong; Tac, Sewyan; Cho, Yong; Hwang, Jaechun; Collins, Maria Elisabeth

doi:10.5293/ijfms.2012.5.4.174

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Tetrahedral grid was connected to hexahedral grid using General Grid Interface (GGI) [13]. The GGI method has been applied to various numerical analyses comprising different physical domains, such as fluid and solid domains [16] or rotating and stationary domains [17]. An O-type grid was adopted around the pin-fin.…”

Section: Numerical Analysismentioning

confidence: 99%

Performance Analysis and Design Optimization of Gapped Pin-Fin in a Cooling Channel

Afzal

Kim

2017

Heat Transfer Engineering

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Performance analysis and optimization of a circular pin-fin with inside gaps in a rectangular cooling channel were performed at Reynolds number, 10,000, using three-dimensional Reynolds-averaged Navier-Stokes equations and a multi-objective genetic algorithm. The lowReynolds-number version of the shear stress transport model was used as turbulence closure. A parametric study was also performed to identify the geometrical effects of the pin-fin on heat transfer and pressure drop. The straight and reference gapped pin-fins yielded better performances than those of the circular pin-fin without the gap in terms of both heat transfer and pressure drop. The objective of the optimization was to maximize the heat transfer and minimize the pressure loss, simultaneously. The area-averaged Nusselt number and pressure loss coefficient were considered as objective functions, and three design variables related to the geometry of the gapped pin-fin were chosen for the optimization. Twenty-seven design points were generated using Latin hypercube sampling in the design space, and response surface approximation models were constructed for the objective functions. The optimization results were analyzed using five representative solutions on the Pareto-optimal front. The objective ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 functions were found to be significantly affected by variation in the design variables, especially, the width of front gap and the rear gap angle.

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Section: Numerical Analysismentioning

confidence: 99%

Performance Analysis and Design Optimization of Gapped Pin-Fin in a Cooling Channel

Afzal

Kim

2017

Heat Transfer Engineering

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“…have been increasing in the last decade. Countries with access to oceans can harness the ocean energy such as wave energy or tidal energy [1,2,3,4]. Wave energy is usually harnessed using a wave energy convertor and these convertors have diverse methods of energy conversion [5].…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Model Test of a Floating Wave Energy Converter with a Cross-flow Turbine

Kim¹,

Kim²,

Wata³

et al. 2016

International Journal of Fluid Machinery and Systems

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Almost 70% of the earth is covered by the ocean. Extracting the power available in the ocean using a wave energy converter has been seen to be eco-friendly and renewable. This study focuses on developing a method for analyzing a wave energy device that uses a cross-flow turbine. The motion of the ocean wave causes an internal bi-directional flow of water and the cross-flow turbine is able to rotate in one direction. This device is considered of double-hull structure, and because of this structure, sea water does not come into contact with theturbine. Due to this, the problem of befouling on the turbine is avoided. This study shows specific relationship for wave length and several motions.

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Multi-objective optimization of arc-shaped ribs in the channels of a printed circuit heat exchanger

Lee

Kim

2015

International Journal of Thermal Sciences

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Effect of Intake Vortex Occurrence on the Performance of an Axial Hydraulic Turbine in Sihwa-Lake Tidal Power Plant, Korea

Cited by 3 publications

References 12 publications

Performance Analysis and Design Optimization of Gapped Pin-Fin in a Cooling Channel

Performance Analysis and Design Optimization of Gapped Pin-Fin in a Cooling Channel

Hydraulic Model Test of a Floating Wave Energy Converter with a Cross-flow Turbine

Multi-objective optimization of arc-shaped ribs in the channels of a printed circuit heat exchanger

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