Performance of an impulse turbine with fixed guide vanes for wave power conversion
TL;DR: In this article, a simple fixed geometry impulse turbine has been studied as a suitable power converter in Oscillating Water Column based wave power plants and the optimum guide vane angle for maximum efficiency has been arrived at based on the five angles tested.
About: This article is published in Renewable Energy.The article was published on 1999-08-01. It has received 76 citations till now. The article focuses on the topics: Wells turbine & Turbine.
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TL;DR: In this paper, a 3D numerical model for the impulse turbine is established to investigate its operating performance of the designed impulse turbine for the pilot OWC system which is under the construction on Jeju Island, Republic of Korea.
Abstract: Oscillating water column (OWC) is the most widely used wave energy converting technology in the world. The impulse turbine is recently been employed as the radial turbine in OWC facilities to convert bidirectional mechanical air power into electricity power. 3D numerical model for the impulse turbine is established in this paper to investigate its operating performance of the designed impulse turbine for the pilot OWC system which is under the construction on Jeju Island, Republic of Korea. The proper mesh style, turbulence model, and numerical solutions are employed to study the velocity and air pressure distribution especially around the rotor blade. The operating coefficients obtained from the numerical simulation are compared with corresponding experimental data, which demonstrates that the 3D numerical model proposed here can be applied to the research of impulse turbines for OWC system. Effects of tip clearances on flow field distribution characteristics and operating performances are also studied.
10 citations
Cites background or methods from "Performance of an impulse turbine w..."
...[1] presented experimental research reports on the impulse turbine within fixed guide vanes for the OWC wave energy converter....
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...Operating performance of the impulse turbinewithin various setting angles of guide vanes is calculated and compared with experimental data in [1] using the 3D numerical method proposed in the present paper....
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...The design profile and parameters of impulse turbines used in the present paper are derived from corresponding experiments in [1]....
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25 Mar 2011
TL;DR: In this paper, a proper mesh style, turbulence model and numerical solutions are employed to study the velocity and air pressure distribution around the blade of the turbine, and the operating coefficient obtained from the numerical simulation is compared with the corresponding experimental data, which demonstrate that the present 3D numerical model can be applied in the research of the impulse turbine for wave energy converter.
Abstract: Oscillating water column wave energy converter is widely used in the world. The impulse turbine is recently employed for the bi-directional mechanical air power into electricity power. The 2D and 3D numerical model is established in the present paper to investigation the operating performance. The proper mesh style, turbulence model and numerical solutions are employed to study the velocity and air pressure distribution around the blade of the turbine. The operating coefficient obtained from the numerical simulation is compared with the corresponding experimental data, which demonstrate that the present 3D numerical model can be applied in the research of the impulse turbine for wave energy converter.
10 citations
Cites methods from "Performance of an impulse turbine w..."
...Comparison of numerical performance of impulse turbine The operating performance of the impulse turbine within various setting angles of the guide vane are calculated and compared with the experimental data in [7] using the 2D and 3D numerical method....
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TL;DR: C coupled CAD-CFD automated optimization of the blade leading and trailing edge ratio was performed to maximize the efficiency of a bidirectional impulse turbine with fixed guide vanes to improve performance.
9 citations
01 Jan 2008
TL;DR: In this chapter the main mechanisms that can be implemented to convert wave into mechanical and/or electrical energy are discussed and those which are linked with the technologies described in Chapter 7 are linked.
Abstract: In this chapter the main mechanisms that can be implemented to convert wave into mechanical and/or electrical energy are discussed. Such mechanisms are often called power take-off (PTO) or power conversion systems (the first is adopted throughout the book). The review is directly linked with the most commonly used options and to those which are linked with the technologies described in Chapter 7. Firstly air turbines, used in Oscillating Water Columns, are focused (6.1), while in 6.2 the principles of linear generators (direct drive) are addressed. Section 6.3 is devoted to hydraulic power take-off systems and details regarding an alternative to electricity production (desalination) are given in 6.4.
9 citations
References
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TL;DR: In this article, an experimental investigation of the aerodynamic performance of a high-solidity Wells turbine for a wave power plant is presented, and the results show that the presence of guide vanes can provide a remarkable increase in turbine efficiency.
Abstract: The paper describes an experimental investigation, and presents the results of the aerodynamic performance of a high-solidity Wells turbine for a wave power plant. A monoplane turbine of 0.6 m rotor diameter with guide vanes was built and tested. The tests were conducted in unidirectional steady airflow. Measurements taken include flow rate, pressure drop, torque, and rotational speed, as well as velocity and pressure distributions. Experimental results show that the presence of guide vanes can provide a remarkable increase in turbine efficiency.
84 citations
Journal Article•
TL;DR: In this article, the performance of an impulse turbine with self-pitch-controlled guide vanes for wave power conversion has been investigated, and the results show that a high-efficiency impulse turbine can be developed by these of guide vane connected by link motions.
Abstract: Experimental investigations directed towards improving the performance of the impulse turbine with self-pitch-controlled guide vanes for wave power conversion are reported. The turbine presented and tested here has an upstream and a downstream guide vane row connected by link motions. The behavior of guide vanes in the reciprocating flows is shown in connection with the axial flow velocity. The results show that a high-efficiency impulse turbine can be developed by these of guide vanes connected by link motions. Furthermore, it is found that the running and starting characteristics of this turbine in the reciprocating flow can be estimated from the performance of the turbine with fixed nozzle and diffuser vanes in a unidirectional steady flow.
59 citations
Journal Article•
TL;DR: In this paper, an impulse turbine with self-pitch-controlled guide vanes was investigated experimentally by the use of turbine test equipment in which the sinusoidally reciprocating flow conditions are simulated.
Abstract: An impulse turbine with self-pitch-controlled guide vanes was proposed by the authors in a previous paper. The unsteady characteristics of this turbine have been investigated experimentally by the use of turbine test equipment in which the sinusoidally reciprocating flow conditions are simulated. The results have been compared with those of a Wells turbine. Furthermore, in order to clarify the usefulness of quasi-steady analysis of this turbine, they have been also compared with the analytical results calculated on the basis of the experimental data obtained by the model testing of a turbine rotor with fixed guide vanes under steady unidirectional flow conditions. As a result, it has been clarified that the impulse turbine presented here is superior to the Wells turbine in overall characteristics, and the quasi-steady analysis is available for this turbine.
48 citations
01 Jan 1998
47 citations
12 May 1986
38 citations