Radyal kompresörlerin açık-kaynak hesaplamalı akışkanlar dinamiği yazılımı SU2 ile performans hesaplamalarının gerçekleştirilmesi

Turbomachinery related computational fluid dynamics works are mostly done with commercial software such as ANSYS, Numeca, etc. In the open-source CFD field, there are not many software packages that prioritize or implement turbomachinery specific features in them. However, the open-source CFD software SU2 is an exception in that regard. It has turbomachinery specific features implemented in it out of the box. In this work, the capabilities of SU2 are investigated for turbomachinery CFD analysis and design, specifically on radial compressors. First step, the fluid flow governing equations are derived. Turbulence modeling and the turbulence models used are briefly explained. The physical modelling and numerical implementation of SU2 are described. The methodology developed for the flow simulations and optimization process are explained. Validation of SU2 is done by using two compressible turbulent flow cases. These cases are turbulent boundary layer and transonic airfoil RAE2822. Both cases see frequent usage in validation studies. These two are relevant for a turbomachinery case as well. For the turbulent boundary layer flow, it is very important for the solver to resolve the boundary layer very accurately. As for the transonic airfoil RAE2822, it is important to see if SU2 can accurately determine the shock location. For the simulations, two radial compressor geometries are used with vaned and vaneless diffusers. Several operating points are used for both geometries. The results obtained with SU2 are comapred to Fidelity Flow results and experimental data provided by MAN Energy Solutions Schweiz AG and ANSYS-CFX. Results from SU2 showed promising results for both geometries. A comparison of available turbulence models in SU2 is also included. SU2 has integrated optimization tools of its own. These out of the box optimization capabilities of SU2 are investigated for its applicability to turbomachinery cases. For this investigation, the vane of the vaned diffuser geometry is used. The diffuser geometry is simplified to a 2D geometry and optimization study is done with this geometry. Optimization study is conducted for only a single operating point, selected from the performance map of the radial compressor with the vaned diffuser. Optimized blade is compared to the baseline design and how much of an improvement made is explained. In the end, the capabilities of SU2 regarding turbomachinery analysis and design are examined. It can be said that as an outcome of this work, even though SU2 has both advantages and disadvantages, it definitely shows good potential in turbomachinery analysis for an open-source CFD tool.