**3. QBlade and XFoils simulation**

QBlade and XFoils are open-source software for the prediction of wind turbine performance. The models generated and performance curves have been shown in the figures below:

We get a maximum power coefficient close to the Betz limit (59.2%, approximately) at the expected TSR of 7. The power coefficient that was obtained verifies our


#### **Table 1.**

*Twist angle vs distance from center.*


#### **Table 2.**

*Chord length vs distance from center.*

**Figure 3.** *Airfoil shapes superimposed on one another.*

design to some extent. **Figure 3** shows the plot of various airfoil curves used for this chapter. **Figure 4** shows the QBlade simulation results.
