Aerodynamic Characteristics of Impulse Turbine with an End Plate for Wave Energy Conversion

J. Ocean Eng. Technol. 2005;19(6):1-7.

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;Korea Research institute of Ships and Ocean Engineering;Korea Research institute of Ships and Ocean Engineering;

Keywords: Wave Energy, Impulse Turbine, End Plate, CFD, Tip Penetration, Vortex Roll-up, Cooper Mesh

Abstract

This paper deals with the design and aerodynamic analysis of a special-type impulse turbine, with an end plate for wave energy conversion. Numerical analysis was performed using a CFD code, FLUENT. The main idea of the proposed end plate was to minimize the adverse effect of tip clearance of turbine blade, and was borrowed from ducted propeller, with so-called penetrating end plate for special purpose marine vehicles.
Results
show that efficiency increases up to $5%$, depending on the flow coefficient; a higher flow coefficient yields increased efficiency. Decrease of input coefficient CAwith an end plate is the main reason for higher efficiency. Performance of end plate at various design parameters, as well as flow conditions, was investigated; the advantages and disadvantages of the presentimpulse turbine were also discussed.