skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Numerical Study on the Aerodynamics of an Iced Airfoil With Scale-Resolving Simulations

Wong, Man-Long ; Ghate, Aditya ; Stich, Gerrit-Daniel ; Kenway, Gaetan ; Kiris, Cetin

Ames Research Center 2023

Texto completo disponível

Citações Citado por
  • Título:
    Numerical Study on the Aerodynamics of an Iced Airfoil With Scale-Resolving Simulations
  • Autor: Wong, Man-Long ; Ghate, Aditya ; Stich, Gerrit-Daniel ; Kenway, Gaetan ; Kiris, Cetin
  • Assuntos: Numerical Analysis
  • Notas: ARC
    Ames Research Center
    National Harbor, MD
  • Descrição: Scale-resolving simulations of the NACA 23012 airfoil with horn ice accretion on the leading edge are conducted using the hybrid Reynolds-averaged Navier–Stokes/large-eddy simulation (hybrid RANS/LES) and wall-modeled large-eddy simulation (WMLES) approaches implemented in the Launch, Ascent, and Vehicle Aerodynamics (LAVA) framework. Aerodynamic results at the Reynolds number of 1.8 million show good comparison with the experimental measurements at different angles of attack from pre-stall to post-stall regimes. The pressure plateaus caused by the flow separation and the recovery of pressure inside the separation bubble around the iced leading edge are well predicted with the scale-resolving simulations when sufficient grid resolution is used around the accreted ice. The unsteadiness of the turbulent flows around the iced airfoil is also examined through the turbulent kinetic energy with the Reynolds normal stress anisotropy. Kelvin–Helmholtz instability (KHI) arises at the shear layer triggered by the upper ice horn and leads to rapid laminar-to-turbulent transition over a large range of angle of attack. With the increase of the angle of attack, the region with high turbulence intensity induced by the unstable shear layer spreads quickly over the entire upper surface of the airfoil. The coherent KHI modes from the upper and lower ice horns are extracted using the spectral proper orthogonal decomposition (SPOD) technique. The SPOD modes extracted from the upper shear layer have large-scale variations in the spanwise direction and low-rank behavior where the energy of the leading SPOD mode at each Strouhal number of the KHI largely represents the total energy when the mode number in the spanwise direction is small.
  • Editor: Ames Research Center
  • Data de criação/publicação: 2023
  • Idioma: Inglês
Links
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.