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Research Papers: Gas Turbines: Turbomachinery

Model Testing of a Series of Counter-Rotating Type Horizontal-Axis Tidal Turbines With 500 mm Diameter

[+] Author and Article Information
Bin Huang

Ocean College,
Zhejiang University,
Zhoushan 316021, China
e-mail: binhuang@zju.edu.cn

Jijun Shi

Department of Vacuum and
Leak Detection Technology,
Beijing Institute of Spacecraft
Environment Engineering,
Beijing 100029, China
e-mail: shijijun11@163.com

Xuesong Wei

Institute of Process Equipment,
Zhejiang University,
Hangzhou 310027, China
e-mail: 13735572905@126.com

1Corresponding author.

Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received March 22, 2016; final manuscript received March 2, 2017; published online May 9, 2017. Assoc. Editor: Haixin Chen.

J. Eng. Gas Turbines Power 139(10), 102602 (May 09, 2017) (9 pages) Paper No: GTP-16-1110; doi: 10.1115/1.4036510 History: Received March 22, 2016; Revised March 02, 2017

Tidal current energy shows great attractive as it stores an enormous amount of predictable sustainable resource that can be extracted and used for the purpose of commercial power generation. The horizontal-axis tidal turbine (HATT) has been proposed as the most effective one among many tidal current energy extraction devices. It is well known that the similarities between horizontal-axis wind turbines (HAWTs) and tidal turbines suggest that much can be transferred from the design and operation of wind turbines. In the present work, a series of model counter-rotating type HATTs were designed according to the experience of a counter-rotating type HAWT, and a test rig was constructed. Experimental tests of the hydrodynamic performance in terms of power coefficient were carried out in a circulating water tunnel. Three model turbines consisting of different front and rear blades were analyzed. Experimental results of power coefficient for a range of tip speed ratios (TSRs) and setting angle matches between the front and rear blades for various conditions are presented. Such results provide valuable data for validating the hydrodynamic design and numerical simulations of counter-rotating type HATTs.

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References

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Figures

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Fig. 1

Intelligent counter-rotating type wind power unit: (a) schematic diagram and (b) photograph

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Fig. 2

Blade element KIT001-11.3% developed from MEL002: (a) hydrofoils and (b) lift–drag ratio improvement

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Fig. 3

Blade profiles of model A-A: (a) front blade, (b) rear blade, and (c) pitch angle and chord distribution

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Fig. 4

Blade profiles of model A-B: (a) rear blade and (b) pitch angle and chord distribution

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Fig. 5

Blade element KIT001 with different relative thicknesses

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Fig. 6

Lift–drag ratio versus angle of attack at different Reynolds numbers for KIT001 series

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Fig. 7

Blade profiles of model C-C: (a) front blade, (b) rear blade, and (c) pitch angle, chord, and thickness distribution

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Fig. 8

Schematic diagram of test apparatus in the water tunnel

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Fig. 9

Test apparatus assembly and installation: (a) test apparatus assembly in the air and (b) test apparatus installation in the water tunnel

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Fig. 10

Photograph of the key components in the test apparatus: (a) bevel gear, (b) static ring of mechanical seal, (c) rotating ring installation, (d) torque and rotating speed detectors, (e) front blade and hub connection, and (f) rear blade and hub connection

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Fig. 11

Power coefficients of model A-A

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Fig. 12

Power coefficients of model A-B

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Fig. 13

Power coefficients of model C-C

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Fig. 14

Comparison of power coefficients under best blade setting angles

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Fig. 15

Proportion of power efficient generated by the front and rear blades for model A-A under best blade setting angles

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Fig. 16

Proportion of power efficient generated by the front and rear blades for model A-B under best blade setting angles

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Fig. 17

Proportion of power efficient generated by the front and rear blades for model C-C under best blade setting angle

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