A review of impulse turbines for wave energy conversion

Setoguchi, Toshiaki; Santhakumar, S.; Maeda, Hideaki; Takao, Manabu; Kaneko, Kenji

doi:10.1016/s0960-1481(00)00175-0

Cited by 200 publications

(147 citation statements)

References 3 publications

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“…The inlet/outlet angle γ of the rotor is 60 degrees and the setting angle θ of the guide vane is 30 degrees. The turbine configuration was adopted on the basis of the air turbine test results [16]. …”

Section: Experimental Apparatusmentioning

confidence: 99%

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Experimental Research on Primary and Secondary Conversion Efficiencies in an Oscillating Water Column-Type Wave Energy Converter

et al. 2016

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Abstract:For the practical application of a fixed oscillating water column (OWC)-type wave energy converter, it is necessary to develop a design method which can consider the characteristics of incident wave motion, the motion of the internal free surface affected in the structure such as a partly submerged wall, the fluctuation of air pressure in an air chamber, and the rotation of the air turbine. On the other hand, the impulse turbine as the secondary conversion device in the OWC unit is expected to achieve high efficiency. In this paper, firstly, the steady air flow tests for a single-impulse turbine were conducted to grasp the characteristics of the turbine without the effect of water waves. Secondly, the 2-dimensional wave tank tests in regular waves for the performance evaluation of the fixed OWC-type wave energy converter with the same impulse turbine were conducted to obtain the data needed to make this design method. As the results, the effects of the air chamber length and the guide vane's setting angle on the primary and secondary conversion efficiencies are clarified experimentally.

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Section: Experimental Apparatusmentioning

confidence: 99%

“…Setoguchi et al [16,17] reviewed a variety of experimental results concerning the performances of the Wells turbine and the impulse turbine. Takao et al [18] show that the impulse turbine with a fixed guide vane was superior to the Wells turbine in the actual sea with irregular waves.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Primary and Secondary Conversion Efficiencies in an Oscillating Water Column-Type Wave Energy Converter

et al. 2016

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“…The airflow is reciprocating in nature. The turbine rotates in one direction irrespective of the airflow direction (Setoguchi, Santhakumar, Maeda, Takao, & Kaneko, 2001). Hence, it is called a bidirectional turbine or bidirectional flow turbine.…”

Section: Introductionmentioning

confidence: 99%

Shape optimization of a bidirectional impulse turbine via surrogate models

Ezhilsabareesh

Rhee

Samad

2017

Engineering Applications of Computational Fluid Mechanics

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In this work, a bidirectional impulse turbine used in a wave energy device is simulated using a CFD technique and a shape optimization performed with multiple surrogates-assisted multi-objective evolutionary algorithm. The surrogates have been generated using the validated CFD technique. The objectives for the optimization are to maximize the shaft power and to minimize the pressure drop across the turbine. The hub and the tip thickness of the rotor blade profiles are modified and considered as the design variables. The Latin hypercube sampling technique generated design points are evaluated in the CFD solver, the objective responses are used to construct multiple surrogates, and a Pareto optimal front is generated through a multi-objective optimization approach. The turbine efficiency, which is the function of pressure drop and shaft power, is relatively increased by 10.4%.

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“…As concerns the secondary conversion, by means of the test rig having a piston-cylinder to generate the oscillating air flow, the performance of the air turbine was evaluated in a series of studies. Setoguchi et al [9,10] reviewed a variety of experimental results concerning the performances of the Wells turbine and the impulse turbine. Besides, Takao et al [11] showed that the impulse turbine was superior to the Wells turbine in a wide flow rate range.…”

Section: Introductionmentioning

confidence: 99%

“…4 shows the basic configuration of the rotor and the fixed guide vanes. This turbine configuration was adopted on the basis of the air turbine test results [9]. The numbers of the rotor blades and the single-stage guide vanes are 30 mm, the hub ratio  is 0.7 and the clearance between the rotor blade tip and the casing is 0.3 mm.…”

Section: Introductionmentioning

confidence: 99%