An automatic geometry and mesh generation tool for helicopter rotor aerodynamic design and analysis

Uzun, Halit Eldem
Helicopter rotors in various flight regimes constitute a fairly complex wing geometry and exhibit motion affected by the rotor wake with strong tip vortices. As a result, rotor motion creates highly three-dimensional flow patterns, and unlike fixed wings, flow around each rotor blade interacts with each other. Due to these complexities, the rotor flow analysis can be very challenging for CFD solvers. The challenge starts with very high-quality requirements on the computational mesh around the rotor geometry. A modern helicopter rotor geometry involves several different airfoil profile sections, profile blending, twists, and other parameters. Moreover, blade tip geometry can be selected from a wide variety of candidates. This thesis presents the development and results of fully automatized rotor geometry and solution domain generation/decomposition tool. A rotor with a very high complexity with any number of blades can be generated with the new tool. The rotor is assumed to be articulated for each blade, and the rotor blades are considered rigid. Very high-quality multi-block and conformal meshes in the flow domain can be generated automatically. The new tool is tested with known helicopter rotors in the literature, and CFD solutions are obtained.


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Citation Formats
H. E. Uzun, “An automatic geometry and mesh generation tool for helicopter rotor aerodynamic design and analysis,” M.S. - Master of Science, Middle East Technical University, 2021.