چكيده به لاتين
Improving the efficiency of axial compressors has been one of the most important goals of designers and engineers for many years, and nowadays diffusion control vanes are increasingly used due to their optimal geometry and lower pressure drop, especially in the aviation industry and in subsonic and transsonic conditions. In the current research, the basic geometry is related to the axial compressor stator section airfoil designed in the National Aerospace Laboratory of India. For this purpose, firstly, the geometry of the cross-section of the main airfoil was produced by extracting its points, and for validation, aerodynamic analysis was performed on it and compared with the main airfoil, and it was confirmed to be consistent. The construction with MATLAB code based on genetic algorithm was carefully followed. In this research, the goal is to change the geometry of the vane profile by changing the coordinates of the cascade points of an axial compressor to minimize the pressure drop of the entire fluid flow. Changing the shape of the vane profile is done by changing the parameters of the PARSEC method, which leads to the creation of new geometries at each stage. Therefore, the MATLAB code is coupled with Ansys software and in Each step of numerical solution for each generated geometry is performed in ANSYS-CFX software and the total pressure drop value is extracted and returned to the code.
. Finally, the work output of the vane was more optimal and with less pressure drop, which was finally compared with the original vane and introduced as a suitable alternative. The amount of total pressure drop between inlet and outlet in the optimized vane has decreased by 18% compared to the original vane and the cascade pressure ratio has increased from 1.13 to 1.17. The improvement of various aerodynamic characteristics is also visible between the two blades, which is presented in the last chapter. The important point is that the geometry of the vane has been modified in such a way that despite the increase in the initial speed, the separation of the flow from the surface was not seen and it did not lead to a double drop, which can increase the efficiency of the vane. Also, the mass flow rate has also increased significantly.
