**2. Physical Model**

Figure 3 shows the steps used in SolidWorks to draw the IceWind blade. It consists of three circles and three lines arranged as shown in Figure 3a. Trimming was used and dimensions were applied, as shown in Figure 3b. The sketch was revolved 90◦ about its axis (right vertical line), as shown in Figure 3c, and then, the extrude function was used to cut the shape, as shown in Figure 3d. Figure 4 shows the final IceWind blade that was used in this study. Its dimensions are *d* = 75 mm and *H* = 75 mm with a 25 mm blade tip height and a swept area of As = 4250.51 mm2. Figures 5 and 6 show the used IceWind turbine.

**Figure 3.** Steps used in SolidWorks to draw the IceWind blade (dimensions are in mm). (**a**) First shape; (**b**) trimmed shape; (**c**) revolved shape; (**d**) preparation of extruded cut shape.

**Figure 4.** IceWind blade (dimensions are in mm).

**Figure 5.** *Cont*.

(**c**)

**Figure 5.** IceWind turbine's three views (dimensions are in mm): (**a**) elevation, (**b**) side view, and (**c**) plan.

**Figure 6.** IceWind turbine.

#### **3. Numerical Model**

Simulations of air flow around the turbine were conducted using Ansys FLUENT after setting the test conditions to be similar to real conditions.
