Effect of Transition Modeling on the XV-15 Hovering Rotor Flows
(2024) AIAA AVIATION FORUM AND ASCEND 2024 — Location: Las Vegas, Nevada (29.July.2024)
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- Authors
- Abstract
- The effects of laminar-to-turbulent transition modeling in the Spalart-Allmaras and Langtry-Menter's shear stress transport turbulence models are explored through high-fidelity simulations of the XV-15 rotor in hover. Using NASA's OVERFLOW solver, solutions on grids of varying resolutions with a range of collective angle configurations are compared alongside experimental data. These results are additionally analyzed relative to the respective base turbulence models: the Spalart-Allmaras model and the Menter's shear stress transport model. The transition models outperform the baseline models in predicting rotor performance in low thrust conditions. They additionally capture complex phenomena such as laminar separation bubbles, turbulent reattachment, and turbulent separation. The transition location is often mispredicted. Incorporating radial flow effects could potentially enhance the accuracy of transition predictions.
- Affiliations
National Aeronautics and Space Administration Ames Research Center
Citations
Garcia Perez, D., Grant, D. J., Sanguinetti, A. J., Caprace, D.-G., Ventura Diaz, P., & Yoon, S. (2024). Effect of Transition Modeling on the XV-15 Hovering Rotor Flows. Proceedings of the AIAA Aviation 2024 Forum. Published. AIAA AVIATION FORUM AND ASCEND 2024, Las Vegas, Nevada. https://doi.org/10.2514/6.2024-4611