标题：Performance Study of Installed an I-65o Type Cylinder at The Upstream of Returning Blade of Savonius Wind Turbine, Comparison With Conventional Savonius Wind Turbine
期刊名称：Majalah Iptek = IPTEK : The Journal for Technology and Science
印刷版ISSN：0853-4098
电子版ISSN：2088-2033
出版年度：2019
卷号：30
期号：2
页码：56-59
DOI：10.12962/j20882033.v30i2.4991
出版社：IPTEK
摘要：Savonius wind turbine has many advantages over others in that its constructions are simpler and cheaper; it is
independent of the wind direction and has a good starting torque at lower wind speeds. However, this type of wind turbine
has the lowest performance compared to others types of wind turbine. That is why various studies have been done to improve
the performance of the turbine Savonius. This paper is proposed in order to increasing the performance of Savonius wind
turbine experimentally by installing an I-65o
type bluff body at the upstream of returning blade of the turbine. The
experiments are carried out for free stream velocity (U) of 7 m/s corresponds to Reynolds number of about 127.000 (based on
the characteristic length of d = 2D-e and free stream velocity (U) from fan used. The center to center distance between the I65o
type cylinder and the returning blade turbine relative to turbine blade diameter S/D specified for 1.4. The diameter of I65o
type cylinder relative to turbine blade diameter is 0.5. The result of experimental show that in general compared to
conventional Savonius wind turbines, the placement of I-65o
type cylinder in front of the returning blade of the Savonius wind
turbine is effective for improving turbine performance. The results of this experiment show that for Re = 127,000, the power
coefficient of the turbine with the I-65o
type cylinder is greater than when the turbine has no I-65o
type cylinder or
conventional Savonius wind turbine. Where in this condition, the maximum coefficient of power the Savonius turbine (CP)
with I-65o
type cylinder can actually increase to 25.66 % compared to the turbine without the I-65o
type cylinder; this is
obtained for Tip Speed Ratio of 0.76.
关键词：I-65o type cylinder;Savonius wind turbine performance;upstream of returning blade
