Effect of hole configurations on film cooling performance

Figures & data

Figure 1. Schematic of computational domain.

Figure 2. Four-hole configurations.

Table 1. Boundary conditions.

Zone	Type	Value
Mainstream	Velocity-inlet	10 m/s, 400 K
Coolant air	Velocity-inlet	Air: M = 0.25, 0.5, 0.75, 1.0, 300 K
Outlet	Pressure-outlet	101325 Pa
Other walls	No-slip	/
Side wall	Symmetry	/

Figure 3. Mesh view.

Figure 4. Model validation and grid independence study.

Figure 5. Streamlines and temperature distributions for two hole configurations, M = 1.0.

Figure 6. Streamlines and temperature contours on middle sections at M = 0.25 and 1.0.

Figure 7. Streamlines and temperature contours on different cross-sections, M = 1.0.

Figure 8. Wall film cooling effectiveness for four-hole configurations with different blowing ratios.

Figure 9. Lateral film cooling effectiveness for four-hole configurations with different blowing ratios, x = 3 d.

Figure 10. Lateral film cooling effectiveness for four-hole configurations with different blowing ratios, x = 15 d.

Figure 11. Lateral-averaged film cooling effectiveness for four-hole configurations with various blowing ratios.

Figure 12. Non-uniformity distribution (D_n) for different hole configurations and blowing ratios.