Detached eddy simulation using a high order low dissipation low dispersion computational method for aeroacoustic purposes

2015-09-10
Cengiz, Kenan
Özyörük, Yusuf
A compressible flow solver designed for determining aeroacoustic source mechanisms is being developed. Capturing the 3-D unsteady turbulent structures is particularly crucial to address quadrapole sources around a solid body. For this purpose, a detached-eddy simulation (DES) method is proposed which is intended to obtain turbulence with acceptable computational costs. Despite the fact that DES is originally designed for separated flows at high Reynolds numbers, recent improvements has made it capable of a wider range of problems, even low-Re attached flows. In this study, the flow solver has low dissipation and low dispersion characteristics together with fourth-order accuracy allowing it to sustain turbulent fluctuations and acoustic waves. The benefits of all these features are intended to be validated through a channel flow case, which is known as a challenge for a DES method. The turbulence not only developed in the channel, but also it was able to give satisfactory results when compared with available DNS data as a reference solution.
Citation Formats
K. Cengiz and Y. Özyörük, “Detached eddy simulation using a high order low dissipation low dispersion computational method for aeroacoustic purposes,” presented at the AIAC′2015 Ankara International Aerospace Conference, Ankara, Turkey, 2015, Accessed: 00, 2021. [Online]. Available: aiac.ae.metu.edu.tr/2015.