## 6 Conclusions  
This study introduces, for the first time, a blade with a specially designed asymmetric profile aimed at enhancing the performance of Darrieus wind turbines. Both experimental and numerical simulations were conducted over a broad range of geometric and operational parameters, yielding promising results.  
The aerodynamic characteristics and self-starting capabilities of three-bladed Darrieus rotors with asymmetric blades were investigated. Experiments were performed in a wind tunnel, and coefficients of drag and lift were analyzed for various angles of attack and wind speeds. Numerical simulations were conducted, and a comparative analysis was presented.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline  & \multicolumn{6}{c}{**Numerical Modeling**} & \multicolumn{6}{c}{**Experimental Investigation**} \\ \hline \(\alpha\) & **3 M/c** & **6 M/c** & **9 M/c** & **12 M/c** & **15 M/c** & **3 M/c** & **6 M/c** & **9 M/c** & **12 M/c** & **  
* Aerodynamic Forces: The highest aerodynamic forces acting on the blade are achieved at angles of attack from 180\({}^{\circ}\) to 210\({}^{\circ}\). The maximum values of drag and lift forces are Cx = 1.38 and Cy = 2.84, respectively.
* Blade Efficiency: The asymmetric blades demonstrated increased lift and a slight increase in drag at various angles of attack, making them effective in low wind speed conditions.
* Geometry Generation and Simulation: Using ANSYS 2022 R2 software for geometric profile generation and subsequent simulation allowed for the assessment of lift and drag coefficients at angles of attack from 0\({}^{\circ}\) to 180\({}^{\circ}\) and various wind speeds. Results showed that flow speed increases relative to the angle of attack. Various pressure contours were observed, with multiple pressure contours forming in the mid-section of the asymmetric profile.
* Maximum Aerodynamic Forces: The highest aerodynamic forces on the blade are observed at angles of attack from 0\({}^{\circ}\) to 180\({}^{\circ}\). At an angle of attack of 180\({}^{\circ}\) and wind speed of 3 m/s, high-speed contours and pressure variations were noted. Maximum drag force was observed at 150\({}^{\circ}\), and lift force was at 180\({}^{\circ}\) with a wind speed of 3 m/s. Significantly negative pressure was observed at an angle of attack of 150\({}^{\circ}\), as confirmed by CL/CD values.
* The numerical simulation results demonstrate a high degree of proximity with the experimental data. The pressure-velocity graphs show a discrepancy within 5%. This proximity confirms the reliability of the model and its ability to describe the physical processes under investigation accurately.  
These results can be used to further improve the design of rotors with asymmetric blades, which will improve their launch characteristics and power coefficients. Further research in this direction will help to increase the energy production of wind power plants in conditions of low wind speeds.  
Conceptualization, Methodology, Validation, Formal Analysis, Investigation, Visualization, R.M.; Experimentation, Review and Editing, Supervision, M.I.; Conceptualization, Methodology, Writing--Review and Editing, Supervision, Funding Acquisition, Z.S.; Resources, B.B.; Investigation, Software, N.K. All authors have read and agreed to the published version of the manuscript.  
This research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP22685893, -Investigation of the aerody-namic characteristics of asymmetric shaped blades used in a wind power plant to increase turn-bine efficiency>>).  
Not applicable.  
We declare that all the data in this article are authentic, valid, and available for use on reasonable request. The data and materials in the current study are available from the corresponding author [PERSON] ([EMAIL_ADDRESS]).  
The authors declare that they have no financial or personal interests that could influence the research conducted or the results presented in this article.