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TAKENOUCHI Kazuki, FIRST MEETING OF ISGG INSTITUTIONAL MEMBERS AND ASSOCIATED NATIONAL ORGANIZATIONS
-Round table: Brainstorming & Envisioning International Cooperation-, 2022.08. |
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Y TAKAMATSU, A FURUKAWA, K OKUMA, K TAKENOUCHI, T SASAKI, G ZHAO, STUDIES ON CAVITATION OCCURRING ON THE RUNNER BLADE OF A DARRIEUS-TYPE WATER TURBINE, JSME INTERNATIONAL JOURNAL SERIES II-FLUIDS ENGINEERING HEAT TRANSFER POWER COMBUSTION THERMOPHYSICAL PROPERTIES, 10.1299/jsmeb1988.35.1_46, Vol.35, No.1, pp.46-52, 1992.02, Cavitation tests were carried out on a Darrieus-type cross-flow water turbine, which could be put into practical use for small water power. In present paper, cavitation phenomena occurring on the Darrieus runner with various blade sections are explained and the characteristics of the incident cavitation coefficient for the attack angles in relative flow around the Darrieus blades are also evaluated with theoretical considerations of the difference between the circular motion of the Darrieus blades and the linear motion of those in a uniform steady flow. As the result, a useful method is proposed for estimating the required net positive suction head (NPSH) of a Darrieus-type water turbine.. |
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Y TAKAMATSU, A FURUKAWA, K OKUMA, K TAKENOUCHI, EXPERIMENTAL STUDIES ON A PREFERABLE BLADE PROFILE FOR HIGH-EFFICIENCY AND THE BLADE CHARACTERISTICS OF DARRIEUS-TYPE CROSS-FLOW WATER TURBINES, JSME INTERNATIONAL JOURNAL SERIES II-FLUIDS ENGINEERING HEAT TRANSFER POWER COMBUSTION THERMOPHYSICAL PROPERTIES, 10.1299/jsmeb1988.34.2_149, Vol.34, No.2, pp.149-156, 1991.05, Fluid forces and moment acting on a blade of a Darrieus-type runner were measured in addition to the blade performance. The characteristics for various type of blades were evaluated from the measured data with theoretical considerations in an inviscid flow. Some features of those characteristics, including the dynamic effects caused by an unsteady relative flow around the Darrieus blade, are shown in the present paper. for high efficiency, a noncambered thin blade with relatively long chord length is recommended. Its characteristics are high lift slope, high lift at zero angle of attack and relatively low drag in a wide no-stall region of attack angles. It should also be set tangent to the runner pitch-circle at the 50% chord point of the blade.. |
