Modelling Errors in Wall-Modelled Large-Eddy Simulations of High-Speed Channel Flows

Noordt, William van; Ganju, Sparsh; Mare, Luca di; Brehm, Christoph

doi:10.2514/6.2023-0284

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Scaleresolving techniques maintain a balance between RANS and LES by resolving a certain portion of the turbulent scales in critical domains while modeling the smaller unresolved scales with RANS in other domains. There are different approaches to implementing scale-resolving techniques, including Wall-Resolved LES (WR-LES) [69], Wall-Modelled LES (WM-LES) [70], Scale-Adaptive Simulation (SAS), Zonal Detached ES (ZDES) [71], Detached ES (DES) [72], and Delayed Detached ES (DDES) [73,74]. The percentage of resolved turbulence, and consequently the accuracy and computational cost, decrease with this order [75,76].…”

Section: Computational/numerical/scale-resolving Approachesmentioning

confidence: 99%

Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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Airflow-induced noise prediction and reduction is one of the priorities for both the energy and aviation industries. This review paper provides valuable insights into flow-induced noise computation, prediction, and optimization methods with state-of-the-art efforts in passive noise reduction on airfoils, blades, and wings. This review covers the combination of several approaches in this field, including analytical, numerical, empirical, semi-empirical, artificial intelligence, and optimization methods. Under passive noise reduction techniques, leading and trailing edge treatments, porous materials, controlled diffusion airfoils, morphing wings, surface treatments, and other unique geometries that researchers developed are among the design modification methods discussed here. This work highlights the benefits of incorporating multiple techniques to achieve the best results concerning the desired application and design. In addition, this work provides an overview of the advantages and disadvantages of each tool, with a particular emphasis on the possible challenges when implementing them. The methods and techniques discussed herein will help increase the acoustic efficiency of aerial structures, making them a beneficial resource for researchers, engineers, and other professionals working in aviation noise reduction.

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