A Parallel CFD-CAA computation of aerodynamic noise for cylinder wake-airfoil interactions

Sven Peth, Jung H. Seo, Young J. Moon, Mare C. Jacob, Frank Thiele

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The various comparisons of hydrodynamic and aero acoustic results with the experimental data showing that the computational methodology used in the present study is reasonably consistent and accurate. Some discrepancy observed in the computational results is primarily because of the grid resolutions for both flow and acoustics. Another possibility is that any form of subgrid scale model was not used in the present large eddy simulation (LES). The simulation pointed out that the whole flow field and tonal noise are governed by the vortex shedding of the rod. The generation mechanism of the tonal noise is the swinging of the stagnation point around the leading edge of the airfoil through periodic interactions of the Karman vortex with the airfoil. The broadband noise is generated by several sources: turbulent wakes between the rod and the airfoil (large amount of volume sources), their interaction with the airfoil leading edge, and the trailing-edge scattering of eddies within the boundary layers over the airfoil. The span-wise coherence functions of the wall pressure are rapidly decaying in most frequencies. Thereby, the span-wise coherence lengths are smaller than the rod diameter in most cases. © 2007

Original languageEnglish
Title of host publicationParallel Computational Fluid Dynamics 2006
PublisherElsevier Ltd
Pages11-18
Number of pages8
ISBN (Print)9780444530356
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'A Parallel CFD-CAA computation of aerodynamic noise for cylinder wake-airfoil interactions'. Together they form a unique fingerprint.

  • Cite this

    Peth, S., Seo, J. H., Moon, Y. J., Jacob, M. C., & Thiele, F. (2007). A Parallel CFD-CAA computation of aerodynamic noise for cylinder wake-airfoil interactions. In Parallel Computational Fluid Dynamics 2006 (pp. 11-18). Elsevier Ltd. https://doi.org/10.1016/B978-044453035-6/50004-3