TY - GEN
T1 - Numerical and Experimental Investigation of Stall on the MERIT Rotor in Hover
AU - Baldan, Giacomo
AU - Heuschneider, Verena
AU - Mitropoulos, Matti
AU - Yavrucuk, Ilkay
AU - Guardone, Alberto
N1 - Publisher Copyright:
Copyright © 2024 by the Vertical Flight Society. All rights reserved.
PY - 2024
Y1 - 2024
N2 - The flow behavior of the two-blade MERIT rotor in hover, focusing on both pre-stall and stall regimes, is investigated through a comprehensive numerical-experimental approach. The study leverages unsteady RANS simulations to compute rotor thrust and power polars and validates them against experimental measurements. Valuable insights are provided into the capabilities of unsteady RANS methods and modern turbulence models for predicting rotor performance across these critical operating conditions. Furthermore, the numerical model incorporates blade deformations by implementing the experimentally measured flap and torsion displacements. A more realistic depiction of the rotor's aerodynamics is provided accounting for the structural deformations of the blades under aerodynamic loads. High-fidelity simulations closely predict the experiments in pre-stall conditions while discrepancies are present when the flow exhibits extended stalled regions. Blade deformations demonstrated to have only a minor effect on thrust and power polars due to the high stiffness of the system.
AB - The flow behavior of the two-blade MERIT rotor in hover, focusing on both pre-stall and stall regimes, is investigated through a comprehensive numerical-experimental approach. The study leverages unsteady RANS simulations to compute rotor thrust and power polars and validates them against experimental measurements. Valuable insights are provided into the capabilities of unsteady RANS methods and modern turbulence models for predicting rotor performance across these critical operating conditions. Furthermore, the numerical model incorporates blade deformations by implementing the experimentally measured flap and torsion displacements. A more realistic depiction of the rotor's aerodynamics is provided accounting for the structural deformations of the blades under aerodynamic loads. High-fidelity simulations closely predict the experiments in pre-stall conditions while discrepancies are present when the flow exhibits extended stalled regions. Blade deformations demonstrated to have only a minor effect on thrust and power polars due to the high stiffness of the system.
UR - http://www.scopus.com/inward/record.url?scp=85192603851&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85192603851
T3 - Vertical Flight Society 80th Annual Forum and Technology Display
BT - Vertical Flight Society 80th Annual Forum and Technology Display
PB - Vertical Flight Society
T2 - 80th Annual Vertical Flight Society Forum and Technology Display, FORUM 2024
Y2 - 7 May 2024 through 9 May 2024
ER -