Yutaek Oh

Yutaek Oh
Hanyang University · Department of Mechanical Engineering

About

7
Publications
398
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152
Citations

Publications

Publications (7)
Article
Wind turbines are widely used these days as one of renewable energy sources. In this paper, a dynamic model of a vertical axis wind turbine is developed by considering coupling effects among shaft bending, shaft torsion, shaft tension, rotor tension and rotor bending. The modal characteristics of the vertical axis wind turbine were obtained by usin...
Article
Gas turbines are operated at high temperatures for increased thermal efficiencies and power outputs. To protect turbine blades from high temperatures and to meet the proper durability requirements, superalloys and cooling passages are widely used. The employment of cooling passages results in significant variations in the temperatures of the blades...
Article
An enhanced dynamic model for a rotating pre-twisted blade with arbitrary cross-section is proposed in this study. The coupling effects between stretching, bending, and torsion are considered simultaneously in this model. To derive the equations of motion, deformation variables, including a special variable representing stretch, are approximated us...
Article
This paper presents a new structural dynamic model with which vibration characteristics of rotating blades made of functionally graded materials (FGMs) can be investigated. The equations of motion of a rotating pretwisted tapered blade made of FGM are derived using the Rayleigh-Ritz assumed mode method along with the Kane's method. After converting...
Article
This paper presents a new structural dynamic model for the vibration analysis of rotating cantilever beams orienting inward with a concentrated added mass and setting angle. To obtain the structural dynamic model, a set of hybrid deformation variables is approximated using the Rayleigh-Ritz assumed mode method. Then dimensionless linear equations o...
Article
The vibration analysis of a rotating gas turbine blade made-up of functionally graded materials is studied. Temperature-dependent material properties are considered according to the high temperature environment and the blade cooling system. The blade is structurally modeled as a thin-walled cantilever box beam with its fixed end mounted on a rotati...
Article
The vibration analysis of a rotating gas turbine blade made-up of functionally graded materials is studied. Temperature-dependent material properties are considered according to the high temperature environment and the blade cooling system. The blade is structurally modeled as a thin-walled cantilever box beam with its fixed end mounted on a rotati...

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