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- Title
Application of a Novel High-Order WENO Scheme in LES Simulations.
- Authors
Zhang, Shuo; Zhong, Dongdong; Wang, Hao; Wu, Xingshuang; Ge, Ning
- Abstract
Featured Application: This study aims to extend the high-order WENO-ZQ scheme to large eddy simulation methodologies. A high-order WENO-ZQ scheme is integrated into a three-dimensional structured grid LES CFD solver for the high-fidelity simulation of complex flows, such as boundary layer separation, transition, and shockwave–turbulent boundary layer interactions. Validations under viscous flow conditions demonstrate that the WENO-ZQ scheme maintains high-resolution accuracy while reducing the number of grid points required, significantly lowering the computational cost of LES. To achieve high-fidelity large eddy simulation (LES) predictions of complex flows while keeping computational costs manageable, this study integrates a high-order WENO-ZQ scheme into the LES framework. The WENO-ZQ scheme has been extensively studied for its accuracy, robustness, and computational cost in inviscid flow applications. This study extended the WENO-ZQ scheme to viscous flows by integrating it into a three-dimensional structured grid LES CFD solver. High-fidelity simulations of turbulent boundary layer flow and supersonic compression ramp flows were conducted, with the scheme being applied for the first time to study laminar boundary layer transition and separation flows in the high-load, low-pressure turbine PakB cascade. Classic numerical case validations for viscous conditions demonstrate that the WENO-ZQ scheme, compared to the same-order WENO-JS scheme, exhibits lower dispersion and dissipation errors, faster convergence, and better high-frequency wave resolution. It maintains high-resolution accuracy with fewer grid points. In application cases, the WENO-ZQ scheme accurately captures the three-dimensional flow characteristics of shockwave–boundary layer interactions in supersonic compression ramps and shows high accuracy and resolution in predicting separation and separation-induced transition in low-pressure turbines.
- Subjects
BOUNDARY layer separation; LAMINAR boundary layer; LARGE eddy simulation models; SUPERSONIC flow; BOUNDARY layer (Aerodynamics)
- Publication
Applied Sciences (2076-3417), 2024, Vol 14, Issue 17, p7875
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app14177875