## 4 Results and Discussion
### Results of NACA0012 Models  
Based on the SST k-omega and Spalart-Allmaras turbulence models and 12 m/16 m/20 m far-field distances, we made six simulation configurations: SST+12 m, SST+16 m, SST+20 m, SA+12 m, SA+16 m, and SA+20 m. Then, applying the simulation parameters described in Table 4, for each NACA0012 model, six groups of simulations were performed and the results of the error ratios compared with the experimental data are illustrated in Figures 6-11. The figures show that the error ratios under different configurations change with the AOA changes. Therefore, at the AOA ranges (0\({}^{\circ}\), 0\({}^{\circ}\)), (0\({}^{\circ}\), 2\({}^{\circ}\)), (0\({}^{\circ}\), 4\  
Figure 8: (**a**) Drag coefficient of sharp trailing edge based on 132 points formula; (**b**) lift coefficient of sharp trailing edge based on 132 points formula.  
Figure 6: (**a**) Drag coefficient of blunt trailing edge based on Airfoil Tools; (**b**) lift coefficient of blunt trailing edge based on Airfoil Tools.  
Figure 7: (**a**) Drag coefficient of sharp trailing edge based on NACA 4-digital; (**b**) lift coefficient of sharp trailing edge based on NACA 4-digital.  
Figure 11: (a) Drag coefficient of sharp trailing edge based on 400 points formula; (b) lift coefficient of sharp trailing edge based on 400 points formula.  
Figure 10: (a) Drag coefficient of sharp trailing edge based on 264 points formula; (b) lift coefficient of sharp trailing edge based on 264 points formula.  
Figure 9: (a) Drag coefficient of sharp trailing edge based on 200 points formula; (b) lift coefficient of sharp trailing edge based on 200 points formula.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{
\begin{tabular}{c} **Simulation Configurations** \\ \end{tabular} } & \multicolumn{6}{c}{**Range of AOA (\({}^{\circ}\))**} \\ \cline{2-7}  & \multicolumn{6}{c}{**Mean Error Ratios of (\(C_{d}\),\(C_{l}\))**} \\ \cline{2-7}  & **(0\({}^{\circ}\), 0\({}^{\circ}\))** & **(0\({}^{\circ}\), 2\({}^{\circ}\))** & **(0\({}^{\circ}\), 4\({}^{\circ}\))** & **(0\({}^{\circ}\), 6\({}^{\circ}\))** & **(0\({}^{\circ}\), 8\({}^{\circ}\))** & **(0\({}^{\circ}\), 10\({}^{\circ}\))** \\ \hline SST+12 m & (1.26\%, 0.00\%) & **(1.03\%, 1.25\%)** & (3.51\%, 1.08\%) & (6.31\%, 1.04\%) & (7.85\%, 1.51\%) & (9.99\%, 1.48\%) \\ SST+16 m & (1.11\%, 0.00\%) & (0.84\%, 1.45\%) & (3.06\%, 1.32\%) & (5.43\%, 1.14\%) & (6.56\%, 1.55\%) & (8.32\%, 1.48\%) \\ SST+20 m & (1.05\%, 0.00\%) & (0.78\%, 1.54\%) & **(2.81\%, 1.44\%)** & (**4.93\%, 1.19\%)** & (**5.75\%, 1.55\%)** & (7.20\%, 1.45\%) \\ SA+12 m & (0.18\%, 0.00\%) & (0.95\%, 1.78\%) & (3.67\%, 1.76\%) & (6.43\%, 1.35\%) & (7.75\%, 1.54\%) & (9.55\%, 1.28\%) \\ SA+16 m & (0.11\%, 0.00\%) & (0.78\%, 1.97\%) & (3.18\%, 2.01\%) & (5.49\%, 1.62\%) & (6.37\%, 1.70\%) & (7.76\%, 1.46\%) \\ SA+20 m & **(0.02\%, 0.00\%)** & (0.73\%, 2.07\%) & (2.98\%, 2.14\%) & (5.03\%, 1.77\%) & (5.61\%, 1.77\%) & (**6.68\%, 1.56\%)** \\ \hline \hline \end{tabular}
\end{table}
Table 10: The mean error ratios of \(C_{d}\) and \(C_{l}\) of the sharp trailing edge based on definition formula applying 132 points.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{
\begin{tabular}{c} **Simulation Configurations** \\ \end{tabular} } & \multicolumn{6}{c}{**Range of AOA (\({}^{\circ}\))**} \\ \cline{2-7}  & \multicolumn{6}{c}{**Mean Error Ratios of (\(C_{d}\),\(C_{l}\))**} \\ \cline{2-7}  & **(0\({}^{\circ}\), 0\({}^{\circ}\))** & **(0\({}^{\circ}\), 2\({}^{\circ}\))** & **(0\({}^{\circ}\), 4\({}^{\circ}\))** & **(0\({}^{\circ}\), 6\({}^{\circ}\))** & **(0\({}^{\circ}\), 8\({}^{\circ}\))** & **(0\({}^{\circ}\), 10\({}^{\circ}\))** \\ \hline SST+12 m