scholarly journals Numerical and Experimental Study on the Savonius Rotor Performance with The Gap Width Variations of Ventilation in Middle Blades

2019 ◽  
Vol 494 ◽  
pp. 012009
Author(s):  
Rudi Hariyanto ◽  
Sudjito Soeparman ◽  
W Denny ◽  
N S Mega
Keyword(s):  
Experimental Study ◽  
Savonius Rotor ◽  
Gap Width

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.

Theoretical and Experimental Study on the Wave Propagation through a Micro Gap

2011 ◽  
Vol 346 ◽  
pp. 508-514
Author(s):  
Xiao Yun Chen ◽  
Gui Lan Yu ◽  
Wei Wei Cao ◽  
Wen Tao Qiang
Keyword(s):  
Experimental Study ◽  
Wave Propagation ◽  
Theoretical Analysis ◽  
Nondestructive Evaluation ◽  
Normal Incidence ◽  
Experimental Results ◽  
Harmonic Waves ◽  
Flat Interface ◽  
Gap Width

In the present paper, a preliminary exploration which includes the theoretical analysis and experimental study on the wave propagation through a micro gap was carried out. Harmonic waves, normal incidence, smooth and flat interface were taken into account. The theoretical and experimental results both show that the initial gap width has significant influences on the harmonics. Their relations may be effective on nondestructive evaluation of a pre-existing gap.

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.

scholarly journals EXPERIMENTAL STUDY OF SOLAR CHIMNEY PERFORMANCE FOR PASSIVE HEATING

2018 ◽  
Vol 18 (3) ◽  
pp. 375-388
Author(s):  
Majid H Majeed ◽  
Ibrahim S Resen
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Vertical Wall ◽  
Air Gap ◽  
Passive Heating ◽  
Front Side ◽  
Solar Chimney ◽  
Constant Height ◽  
Gap Width ◽  
Indoor And Outdoor

An experimental investigation on solar chimney used for heating under climate of Iraqis carried out. Experiments were conducted on the chimney installed on vertical wall withabsorber plate placed at the front side of the air gap. The solar chimney attached to room ofdimensions (2.5×1.29×1.07) m. The chimney is studied to measure the effect of the air gapwidth with constant height of (1.07 m). Three widths are tested, namely, 0.2 m, 0.3 m and0.4 m. The experimental results showed that the solar chimney can achieve about (13 °C)difference in temperature between indoor and outdoor as well as it gives acceptabledifference in partial cloudy days. The results also indicated that the best performance ofsolar chimney is with 0.3m air gap width.

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