scholarly journals Experimental study of helical savonius rotor profiles with different number of blade

2020 ◽  
Vol 599 ◽  
pp. 012009
Author(s):  
E S Wijianti ◽  
Saparin ◽  
Y Setiawan
Keyword(s):  
Experimental Study ◽  
Savonius Rotor ◽  
Rotor Profiles

scholarly journals An experimental study on improvement of Savonius rotor performance

2012 ◽  
Vol 51 (1) ◽  
pp. 19-25 ◽  
Author(s):  
N.H. Mahmoud ◽  
A.A. El-Haroun ◽  
E. Wahba ◽  
M.H. Nasef
Keyword(s):  
Experimental Study ◽  
Savonius Rotor

scholarly journals Experimental Study of Darrieus-Savonius Water Turbine with Deflector: Effect of Deflector on the Performance

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Kaprawi Sahim ◽  
Kadafi Ihtisan ◽  
Dyos Santoso ◽  
Riman Sipahutar
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Performance Characteristics ◽  
Power Coefficient ◽  
Irrigation Canal ◽  
Savonius Rotor ◽  
Water Turbine ◽  
Darrieus Rotor ◽  
Deflector Plate

The reverse force on the returning blade of a water turbine can be reduced by setting a deflector on the returning blade side of a rotor. The deflector configuration can also concentrate the flow which passes through the rotor so that the torque and the power of turbine can be considerably increased. The placing of Savonius in Darrieus rotor is carried out by setting the Savonius bucket in Darrieus rotor at the same axis. The combination of these rotors is also called a Darrieus-Savonius turbine. This rotor can improve torque of turbine. Experiments are conducted in an irrigation canal to find the performance characteristics of presence of deflector and Savonius rotor in Darrieus-Savonius turbine. Results conclude that the single deflector plate placed on returning blade side increases the torque and power coefficient. The presence of Savonius rotor increases the torque at a lower speed, but the power coefficient decreases. The torque and power coefficient characteristics depend on the aspect ratio of Savonius rotor.

Experimental Study on the Aerodynamic Performance of a Savonius Rotor

1994 ◽  
Vol 116 (3) ◽  
pp. 148-152 ◽  
Author(s):  
Nobuyuki Fujisawa ◽  
Futoshi Gotoh
Keyword(s):  
Experimental Study ◽  
Close Agreement ◽  
Aerodynamic Performance ◽  
Convex Side ◽  
Torque Measurement ◽  
Side Force ◽  
Savonius Rotor ◽  
Moving Wall ◽  
Pressure Distributions ◽  
Pressure Region

The aerodynamic performance of a Savonius rotor has been studied by measuring the pressure distributions on the blade surfaces at various rotor angles and tip-speed ratios. It is found that the pressure distributions on the rotating rotor differ remarkably from those on the still rotor especially on the convex side of the advancing blade, where a low pressure region is formed by the moving wall effect of the blade. The torque and power performances, evaluated by integrating the pressure, are in close agreement with those by the direct torque measurement. The drag and side force performance is also studied.

An experimental study on improvement of a Savonius rotor performance with curtaining

2008 ◽  
Vol 32 (8) ◽  
pp. 1673-1678 ◽  
Author(s):  
Burçin Deda Altan ◽  
Mehmet Atılgan ◽  
Aydoğan Özdamar
Keyword(s):  
Experimental Study ◽  
Savonius Rotor

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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