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전산유체기법을 이용한 H-다리우스형 수직축 풍력터빈의 유동해석
정수윤(S. Y. Jeong),장세명(S. M. Chang) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this study, we have constructed the method of design about H-Darrieus wind turbine, a kind of VAWT. The NACA 0012 airfoil is chosen for the blade, and modelled two-dimensionally. We computed the distribution of tip speed ratio versus power coefficient using DMST(double multiple stream-tube theory). Next, the flow field is computed numerically with FEM to the solution of rotating Navier-Stokes equations using a commercial code COMSOL™. From the comparison of experimental data on the lift/drag coefficient and the pressure coefficient distribution along chord positions with the result of numerical analysis, the reliability of the present research is checked, through which the k-ε turbulent model is tuned for the parameters such as turbulent length and intensity adequate to this purpose. Also through the change of the principal parameters concerning non-dimensional similarity, we developed the method to design VAWT more efficiently, and could identify the aerodynamic characteristics.
정수윤(S. Y. Jeong),장세명(S. M. Chang),양재삼(J. S. Yang) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-
A kind of disk-shape boundary layer pump is designed numerically by using a software of computational fluid dynamics, which is widely used for the special purposes such as artificial hearts, bio-fluidics and transportation of oceanic Lives, etc. From the numerical simulation with an axisymmetric model, some benchmark problems are tested and compared with experimental results. The performance of disk pump is graphically visualized from the computational results, and converted to the dimensionless parameters. Finally, the obtained numerical data in the present investigation can be used for the baseline for new design to achieve a more efficient disk pump.