Table 3: Grid number vs. efficiency for all turbines.

Level number1234

Grid number2-bladed turbine1.5 2.85.17.6
Efficiency19.2216.0114.1514.12
Torque change-7.51%2.39%1.29%
Flow rate change-4.9%3.21%1.86%

Grid number3-bladed turbine5.37.9
Efficiency22.1022.09
Torque change-1.72%
Flow rate change-1.96%

Grid number5-bladed turbine5.68.2
Efficiency28.1528.14
Torque change-1.29%
Flow rate change-1.67%

Grid number8-bladed turbine5.88.8
Efficiency26.4126.41
Torque change-1.11%
Flow rate change-1.37%

Grid number10-bladed turbine6.29.5
Efficiency24.6624.66
Torque change-1.02%
Flow rate change-1.16%