scholarly journals Numerical simulation on improvement of a Savonius vertical axis water turbine performance to advancing blade side with a circular cylinder diameter variations

2018 ◽  
Vol 200 ◽  
pp. 012029 ◽  
Author(s):  
P A Setiawan ◽  
T Yuwono ◽  
W A Widodo
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Vertical Axis ◽  
Turbine Performance ◽  
Cylinder Diameter ◽  
Water Turbine

scholarly journals Numerical study of savonius water turbine performance by adding deflector to advancing blade side

2018 ◽  
Author(s):  
Priyo Agus Setiawan ◽  
Anda Iviana Juniani ◽  
Adi Wirawan Husodo
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Study ◽  
Renewable Energy Sources ◽  
Power Coefficient ◽  
Turbine Performance ◽  
Water Turbine ◽  
Unsteady Rans ◽  
Deflector Plate ◽  
Coarse To Fine

As one of the best renewable energy sources, hydropower becomes more predictable sourcecompared to wind energy and Savonius which its performance does not contingent to fluid flowdirection. In this present, computational Fluid Dynamics acomplished by Finite Volume Methodand unsteady RANS equation were applied to analyze the numerical simulation. The presentstudy investigated the performance of Savonius Turbine by adding deflector plate installed toadvancing blade side at 5, 10, 15, 30 and 45 of deflector angles in the direction of the fluid flow.The viscous turbulence model used realizable k-epsilon (RKE) and its descritization usedsecond order upwind. The type of mesh was made from coarse to fine meshing with 8 (eight)types of meshing and the grid independency of the numerical simulation had been validated bythe publish experimental data at TSR of 1,078. Grid independency occured at meshing G withthe error lower than 5 % compared to published experimental data. The result of this studyshows that the performance of Savonius turbine increased by adding deflector in advancingblade side with the maximum torque and power coefficient at 30 of deflector angle.

0504 Numerical Simulation about the Effects of Endplates on Straight-Bladed Vertical Axis Wind Turbine Performance

2015 ◽  
Vol 2015 (0) ◽  
pp. _0504-1_-_0504-2_
Author(s):  
Yuuki FURUKAWA ◽  
Yutaka HARA ◽  
Takahiro SUMI ◽  
Hiromichi AKIMOTO ◽  
Shigeo YOSHIDA
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Turbine Performance

Three-dimensional numerical simulation of oscillatory flow around a circular cylinder at right and oblique attacks

2011 ◽  
Vol 38 (17-18) ◽  
pp. 2056-2069 ◽  
Author(s):  
Ming Zhao ◽  
Liang Cheng ◽  
Tongming Zhou
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Oscillatory Flow ◽  
Three Dimensional

scholarly journals Numerical Simulation of 2D Flow around a Circular Cylinder by the Third-Order Upwind Finite-Difference Method.

1993 ◽  
Vol 59 (566) ◽  
pp. 2937-2943 ◽  
Author(s):  
Hikaru Matsumiya ◽  
Kaori Kieda ◽  
Nobuyuki Taniguchi ◽  
Toshio Kobayashi
Keyword(s):  
Numerical Simulation ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Circular Cylinder ◽  
Difference Method ◽  
Third Order ◽  
The Third ◽  
2D Flow ◽  
Upwind Finite Difference

scholarly journals Prediction of the secondary wake instability of a circular cylinder with direct numerical simulation

2017 ◽  
Vol 149 ◽  
pp. 172-180 ◽  
Author(s):  
Hongyi Jiang ◽  
Liang Cheng ◽  
Scott Draper ◽  
Hongwei An
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Direct Numerical Simulation ◽  
Wake Instability

Starting System for Darrieus Water Turbine of Tidal Stream Electricity Generation

2016 ◽  
Author(s):  
Seiji Shimizu ◽  
Masayuki Fujii ◽  
Tetsuya Sumida ◽  
Kenji Sasa ◽  
Yasuhiro Kimura ◽  
...  
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Electricity Generation ◽  
Lift Coefficient ◽  
Vertical Axis ◽  
Cylindrical Shape ◽  
Water Turbine ◽  
Tidal Stream ◽  
Tidal Stream Turbine ◽  
Original Experimental Data

Darrieus type vertical axis water turbine in a cylindrical shape which consists of some straight blades is simple, efficient and easy to install a generator upward. However, it has difficulty in starting revolution. As a method to cope with such a problem, a starting revolution assist mechanism was fabricated and set on a prototype of the turbine. Assist experiment was carried out. It resulted helping well the starting revolution. The improved prototype of tidal stream turbine can generate 1.4 W under a water flow of 1 m/s where impossible to self-start. Besides that, Darrieus water turbine’s generating torque property was investigated by the famous original experimental data of lift coefficient Cl and drag coefficient Cd for straight blades of NACA63 3-018 cross section. It was found that setting two or four blades in a turbine would help to improve the difficulty of starting revolution.

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