User Tools

Site Tools


Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
Last revisionBoth sides next revision
lab:zephyr:rotors [2016/07/16 20:44] – [Rotors] chronolab:zephyr:rotors [2016/07/25 13:46] – [Power Estimation] chrono
Line 88: Line 88:
 ^ <x 12>A</x> | m² | Swept area (turbine/sail etc.) | ^ <x 12>A</x> | m² | Swept area (turbine/sail etc.) |
 ^ <x 12>V</x> | m/s  | Wind speed | ^ <x 12>V</x> | m/s  | Wind speed |
-^ <x 12>\rho</x> | kg/m³ | (rho) Air density (~1.225|+^ <x 12>\rho</x> | kg/m³ | Density of Air (rho) ~1.225 at 25°C |
  
 **Example: eXperimental Turbine Lenz-Rotor with 0.96 m² surface @ 4 m/s** **Example: eXperimental Turbine Lenz-Rotor with 0.96 m² surface @ 4 m/s**
Line 123: Line 123:
 | Decent VAWT | 0.30 | | Decent VAWT | 0.30 |
 | Good VAWT | 0.35 | | Good VAWT | 0.35 |
-Superb  VAWT | 0.40 | +Good HAWT | 0.40 | 
-Superb  HAWT | 0.45 |+Big Grid MW+ HAWT | 0.45 |
  
 === Torque === === Torque ===
Line 161: Line 161:
  
 <x 20> <x 20>
-Re = {{V ∗ D ∗ \rho}/{\u}}+Re = {{V ∗ D ∗ \rho}/{\nu}}
 </x> </x>
  
Line 167: Line 167:
 ^ <x 12>V</x> | m/s | Incoming flow velocity | ^ <x 12>V</x> | m/s | Incoming flow velocity |
 ^ <x 12>D</x> | m | Turbine Diameter | ^ <x 12>D</x> | m | Turbine Diameter |
-^ <x 12>\rho</x> | kg/m³ | Density of Air (rho) ~1.225 at 25°C+^ <x 12>\rho</x> | kg/m³ | Density of Air (rho) ~1.225 at 25°C | 
-^ <x 12>\u</x> | m²/s | Kinematic viscosity of Air (1.57e-5 at 25 °C|+^ <x 12>\nu</x> | m²/s | Kinematic viscosity of Air (nu) ~1.57e-5 at 25 °C |
  
 **Example: Helical Gorlov-Rotor with 35 cm radius @ 4 m/s** **Example: Helical Gorlov-Rotor with 35 cm radius @ 4 m/s**