A Study on the Performance of the Ring-type Impulse Turbine for Wave Energy Conversion

J. Ocean Eng. Technol. 2006;20(1):20-25.

HYUN BEOM-SOO;MOON JAE-SEUNG;HONG SEOK-WON;KIM KI-SUP;

Division of Ocean Systems Engineering, Korea Maritime University;Division of Ocean Systems Engineering, Korea Maritime University;Maritime and Ocean Engineering Research Institute;Maritime and Ocean Engineering Research Institute;

파력발전용 링타입 임펄스터어빈의 성능 해석

현범수;문재승;홍석원;김기섭;

한국해양대학교 해양시스템공학과;한국해양대학교 해양시스템공학과;한국해양연구원 해양시스템안전연구센터;한국해양연구원 해양시스템안전연구센터;

Keywords: Wave Energy, Impulse Turbine, CFD, Ring-type Turbine, Tip Treatment, End Plate, Cooper Mesh

핵심용어: 파력발전, 충동식 터어빈, 전산유체역학, 링-타입 터어빈, 날개끝 처리, 익단판, 쿠퍼 격자

Abstract

This paper deals with the design and aerodynamic analysis of a so-called 'ring-type' impulse turbine for wave energy conversion. Numerical analysis was performed using the CFD cock, FLUENT. The main idea of the proposed turbine rotor was to minimize the adverse effect of tip clearance of the turbine blade; the design was borrowed from a ducted propeller with connected ring tip for special purpose marine vehicles.
Results
show that the efficiency increases up to $10%$, depending on flaw coefficient, with the higher flaw coefficient yielding better efficiency. Decrease of input coefficient CA was the main reason for higher efficiency. Performance of ring-type rotor at various design parameters, as well as flaw conditions, was investigated, and the advantages and the disadvantages of the present impulse turbine were also discussed.