Study of an Impulse Turbine for Wave Power Conversion: Effects of Reynolds Number and Hub-to-Tip Ratio on Performance

2004 ◽  
Vol 126 (2) ◽  
pp. 137-140 ◽  
Author(s):  
T. Setoguchi ◽  
M. Takao ◽  
S. Santhakumar ◽  
K. Kaneko
Keyword(s):  
Reynolds Number ◽  
Power Conversion ◽  
Critical Value ◽  
Oscillating Flow ◽  
Wave Power ◽  
Wave Energy Conversion ◽  
Flow Conditions ◽  
Impulse Turbine ◽  
Wave Power Conversion ◽  
Starting Characteristics

The objective of this paper is to report the effects of Reynolds number and hub-to-tip ratio on the performance of the impulse turbine for wave energy conversion. The turbine was investigated experimentally under steady and sinusoidally oscillating flow conditions by model testing. As a result, it was found that the critical value of Reynolds number and the optimum hub-to-tip ratio are approximately 4.0×104 and 0.7, respectively. Furthermore, their effect on starting characteristics have been clarified.

scholarly journals Impulse Turbine with Self-pitch-controlled Guide Vanes for Wave Power Conversion (Effect of Guide Vane Geometry on the Performance)

2000 ◽  
Vol 6 (5) ◽  
pp. 355-362 ◽  
Author(s):  
M. Takao ◽  
Y. Kinoue ◽  
T. Setoguchi ◽  
T. Obayashi ◽  
K. Kaneko
Keyword(s):  
Cross Sections ◽  
Guide Vane ◽  
Power Conversion ◽  
Wave Power ◽  
Wave Energy Conversion ◽  
Impulse Turbine ◽  
The West ◽  
Guide Vanes ◽  
Wave Power Conversion ◽  
Effect Of Support

An impulse turbine with self-pitch-controlled guide vanes has been developed specially for wave energy conversion by the authors. Based on that work, a large turbine of 1 m diameter has been fabricated and operated on the west coast of India. In a practical turbine system, the guide vanes need substantial supports in order to heighten the strength. Such supports affect the performance of the turbine. In this paper, the etfect of guide vane support geometry on starting and running characteristics of the turbine was investigated experimentally. Two types of cross sections of support were studied, that is, circular type and airfoil type. The effect of support length was also studied.

scholarly journals A Comparison of Performances of Turbines for Wave Power Conversion

2000 ◽  
Vol 6 (2) ◽  
pp. 129-134 ◽  
Author(s):  
T. Setoguchi ◽  
M. Takao ◽  
K. Kaneko
Keyword(s):  
Power Conversion ◽  
Wave Power ◽  
Impulse Turbine ◽  
Guide Vanes ◽  
Wave Power Conversion ◽  
Near Future

A number of self-rectifying air turbines for wave power conversion have been proposed so far. This paper shows the comparison of the performances of all these turbines proposed for use in the near future. As a result, the impulse turbine with self-pitch-controlled guide vanes is found to have the best performance.

scholarly journals Impulse Turbine with Air Flow Rectification System for Wave Power Conversion.

2000 ◽  
Vol 66 (646) ◽  
pp. 1421-1427
Author(s):  
Hideaki MAEDA ◽  
Toshiaki SETOGUCHI ◽  
Manabu TAKAO ◽  
Kenji KANEKO ◽  
Masahiro INOUE
Keyword(s):  
Air Flow ◽  
Power Conversion ◽  
Wave Power ◽  
Impulse Turbine ◽  
Wave Power Conversion

scholarly journals One-dimensional Analysis of Impulse Turbine with Self-pitch-controlled Guide Vanes for Wave Power Conversion

2000 ◽  
Vol 6 (2) ◽  
pp. 151-157 ◽  
Author(s):  
M. Inioue ◽  
K. Kaneko ◽  
T. Setoguchi
Keyword(s):  
Dimensional Analysis ◽  
Flow Condition ◽  
Power Conversion ◽  
Aerodynamic Characteristics ◽  
Wave Power ◽  
Impulse Turbine ◽  
Guide Vanes ◽  
One Dimensional ◽  
Flow Rate Coefficient ◽  
Wave Power Conversion

A classical one-dimensional analysis in turbomachinery was presented to estimate aerodynamic characteristics of an impulse turbine with self-pitch-controlled guide vanes which is proposed by the authors for ocean wave power conversion. With some simplified assumptions, the efficiency vs/flow-rate coefficient curves were calculated and compared with the experimental results both in a unidirectional steady flow condition and a sinusoidally oscillating flow condition. The estimated results reveal a behavior of the actual characteristics curve of the turbine. Possibility of further improvement in efficiency was discussed from a viewpoint of specific speed and specific diameter.

scholarly journals Experimental Study of a Radial Turbine Using Pitch-Controlled Guide Vanes for Wave Power Conversion

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Manabu Takao ◽  
Yoshihiro Fujioka ◽  
Hiroki Homma ◽  
Tae-Whan Kim ◽  
Toshiaki Setoguchi
Keyword(s):  
Experimental Study ◽  
High Performance ◽  
Guide Vane ◽  
Power Conversion ◽  
Wave Power ◽  
Flow Conditions ◽  
Guide Vanes ◽  
Radial Turbine ◽  
Wave Power Conversion ◽  
Sinusoidal Flow

In order to develop a high-performance radial turbine for wave power conversion, a radial turbine with pitch-controlled guide vanes has been proposed and manufactured in the study. The proposed radial turbine has been investigated experimentally by model testing under steady and sinusoidal flow conditions. Then, the experimental results have been compared with those of the conventional radial turbine for wave power conversion, that is, a radial turbine with fixed guide vanes. As a result, the running characteristics of the proposed radial turbine under steady and sinusoidal flow conditions were clarified and the effect of diffuser setting angle of guide vane on the turbine characteristics was presented. Furthermore, it seems that the proposed radial turbine is much superior to the conventional radial turbine.

scholarly journals Study on an Impulse Turbine for Wave Power Conversion.

1999 ◽  
Vol 65 (629) ◽  
pp. 255-261 ◽  
Author(s):  
Toshiaki SETOGUCHI ◽  
Manabu TAKAO ◽  
Yoichi KINOUE ◽  
Kenji KANEKO ◽  
Masahiro INOUE
Keyword(s):  
Power Conversion ◽  
Wave Power ◽  
Impulse Turbine ◽  
Wave Power Conversion

Performance of an impulse turbine with fixed guide vanes for wave power conversion

1999 ◽  
Vol 17 (4) ◽  
pp. 533-547 ◽  
Author(s):  
H Maeda ◽  
S Santhakumar ◽  
T Setoguchi ◽  
M Takao ◽  
Y Kinoue ◽  
...  
Keyword(s):  
Power Conversion ◽  
Wave Power ◽  
Impulse Turbine ◽  
Guide Vanes ◽  
Wave Power Conversion

Noise characteristics of turbines for wave power conversion

2002 ◽  
Vol 216 (3) ◽  
pp. 223-228 ◽  
Author(s):  
M Takao ◽  
T Setoguchi ◽  
K Kaneko ◽  
S Raghunathan ◽  
M Inoue
Keyword(s):  
Steady Flow ◽  
Noise Level ◽  
Power Conversion ◽  
Experimental Investigations ◽  
Wave Power ◽  
Flow Conditions ◽  
Noise Characteristics ◽  
Wave Power Conversion

A variety of designs of self-rectifying air turbines for wave power conversion have been proposed over the last decade. However, the noise characteristics of the turbines have not been presented so far. In order to clarify the noise characteristics of the turbines, experimental investigations have been performed under steady flow conditions in this study. As a result, it is found that the noise characteristics of impulse-type turbines are superior to those of Wells-type turbines. Moreover, the noise characteristics have been discussed from the viewpoint of the specific noise level, a term used widely in engineering.

scholarly journals Comparison of Performances of Turbines for Wave Power Conversion.

1999 ◽  
Vol 65 (634) ◽  
pp. 2063-2070 ◽  
Author(s):  
Toshiaki SETOGUCHI ◽  
Manabu TAKAO ◽  
Yoichi KINOUE ◽  
Kenji KANEKO ◽  
Tae-Ho KIM ◽  
...  
Keyword(s):  
Power Conversion ◽  
Wave Power ◽  
Wave Power Conversion
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