A Laboratory Study of the Effect of Surface Waves on Heat and Momentum Transfer at High Wind Speeds

2020 ◽  
Vol 125 (7) ◽  
Author(s):  
Yuliya Troitskaya ◽  
Daniil Sergeev ◽  
Maksim Vdovin ◽  
Alexander Kandaurov ◽  
Olga Ermakova ◽  
...  
Keyword(s):  
Surface Waves ◽  
Momentum Transfer ◽  
Laboratory Study ◽  
High Wind ◽  
Wind Speeds ◽  
Heat And Momentum Transfer ◽  
Effect Of Surface

A Laboratory Study of the Effect of Surface Waves on Heat and Momentum Transfer at High Wind Speeds

2020 ◽  
Author(s):  
Yuliya I. Troitskaya ◽  
Daniil Sergeev ◽  
Maxim Vdovin ◽  
Naohisa Takagaki ◽  
Alexander Kandaurov ◽  
...  
Keyword(s):  
Surface Waves ◽  
Momentum Transfer ◽  
Laboratory Study ◽  
High Wind ◽  
Wind Speeds ◽  
Heat And Momentum Transfer ◽  
Effect Of Surface

HEAT AND MOMENTUM TRANSFER BY VORTEX IN MIXING LAYER

1998 ◽  
Author(s):  
A. Jazdauskas ◽  
R. Slezas ◽  
Anupras Slanciauskas ◽  
Algis Dziugys
Keyword(s):  
Momentum Transfer ◽  
Mixing Layer ◽  
Heat And Momentum Transfer

scholarly journals Dependence of Power Characteristics on Savonius Rotor Segmentation

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2912
Author(s):  
Krzysztof Doerffer ◽  
Janusz Telega ◽  
Piotr Doerffer ◽  
Paulina Hercel ◽  
Andrzej Tomporowski
Keyword(s):  
High Wind ◽  
Horizontal Axis Wind Turbine ◽  
Savonius Rotor ◽  
Power Characteristics ◽  
Wind Speeds ◽  
Single Segment ◽  
High Elongation ◽  
Low Wind Speeds ◽  
Number Of Segments ◽  
Rotor Type

Savonius rotors are large and heavy because they use drag force for propulsion. This leads to a larger investment in comparison to horizontal axis wind turbine (HAWT) rotors using lift forces. A simple construction of the Savonius rotor is preferred to reduce the production effort. Therefore, it is proposed here to use single-segment rotors of high elongation. Nevertheless, this rotor type must be compared with a multi-segment rotor to prove that the simplification does not deteriorate the effectiveness. The number of segments affects the aerodynamic performance of the rotor, however, the results shown in the literature are inconsistent. The paper presents a new observation that the relation between the effectiveness of single- and multi-segment rotors depends on the wind velocity. A single-segment rotor becomes significantly more effective than a four-segment rotor at low wind speeds. At high wind speeds, the effectiveness of both rotors becomes similar.

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