## 6 Conclusions  
In this study, experimental and numerical investigations were conducted on the aerodynamic characteristics of a [PERSON] rotor with our proposed asymmetric blades in two structural configurations: with and without horizontal parallel plates. The obtained results made it possible to identify the effect of the plates on the rotor efficiency at low wind speeds and determine their effect on the key aerodynamic parameters. The experimental data showed that the rotor with horizontal parallel plates demonstrates a higher power factor (\(C_{p}\)) and better self-starting compared to the rotor without plates, and at a wind speed of 3-6 m/s, the rotor with plates showed 18-22% higher torque, which facilitates the start and stable operation of the turbine. The CFD numerical modeling confirmed that the presence of horizontal plates helps to stabilize the air flow around the blades, and the vortex structures behind the blades of the rotor with plates are less pronounced, which reduces aerodynamic drag and minimizes energy losses. Parallel plates create a directional flow  
Figure 17: Change in the \(C_{p}\) power factor depending on the wind turbine speed factor. Numerical modeling: 1—with plate, 2—without plate. Experimental data: 3—with plate, 4—without plate.  
effect, increasing the lift of the blades and contributing to a more efficient conversion of wind energy into mechanical work. In the case of a rotor without plates, the CFD modeling revealed significant low-pressure zones and strong turbulence behind the blades, which leads to an unstable flow and increased aerodynamic losses. As the wind speed increases above 9 m/s, the difference in efficiency between the two designs decreases, but at weak winds, the rotor with plates continues to demonstrate better performance.  
Thus, it was established that the Darrieus rotor with our blades and horizontal parallel plates demonstrates higher efficiency at low wind speeds compared to the rotor without plates. The performance improvement is associated with flow stabilization, reduced vortex losses, and increased lift force, as confirmed by both experimental and numerical studies. The obtained results indicate that the Darrieus rotor with plates and the proposed asymmetric blades is a promising solution for small-scale wind energy systems operating under low and variable wind conditions.  
Experiment execution, review and editing, and guidance, M.I.; conceptualization, methodology, validation, formal analysis, investigation, and visualization, R.M.; conceptualization, methodology, writing--review and editing, guidance, and acquisition of funding, Z.S.; conceptualization and methodology, A.Y.; investigation and software, N.K.; investigation and resources, Z.B. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP22685893, =Investigation of the aerodynamic characteristics of asymmetric shaped blades used in a wind power plant to increase turbine efficiency-).  
We declare that all the data in this article are authentic, valid, and available for use upon 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.