High accuracy DNS and les of high reynolds number, supersonic base flows and passive control of the near wake

D. A. Von Terzi, R. D. Sandberg, J. Sivasubramanian, H. F. Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Supersonic axisymmetric base flows are prototypical for flows behind projectiles and missiles, For these flows, drag reduction can be achieved by means of passive control of the near wake. Thereby, large (turbulent) coherent structures play a dominant role. The objective of the present investigation is to elucidate if and how successful passive flow control techniques modify these structures. To this end, first Direct Numerical Simulations (DNS) for a Reynolds number of ReD = 100,000 and Mach number of Ma =2.46 were performed using a high-order accurate and highly parallelized research code which was developed at the University of Arizona. Thereby, roughly 52 million grid points were employed. The DNS data serve to visualize typical structures of the unsteady flow field and to verify that the use of less computational costly RANS/LES methods is applicable for this flow. Two of these methods, the Flow Simulation Methodology (FSM) and Detached Eddy Simulations (DES), were then employed to investigate the supersonic base flow at ReD =3.3 × 106 and Ma = 2.46 using between 460,000 and seven million grid points. For the DES, the commercial CFD-code Cobalt was employed. This unstructured grid solver allowed then to perform simulations with boat-tailing. The obtained mean flow data are compared to available experimental results.

Original languageEnglish (US)
Title of host publicationDoD High Performance Computing Modernization Program
Subtitle of host publicationProceedings of the HPCMP Users Group Conference 2005
Pages119-127
Number of pages9
DOIs
StatePublished - Dec 1 2005
EventDepartment of Defense High Performance Computing Modernization Program: HPCMP Users Group Conference 2005 - Nashville, TN, United States
Duration: Jun 27 2005Jun 30 2005

Publication series

NameDepartment of Defense High Performance Computing Modernization Program: Proceedings of the HPCMP Users Group Conference 2005
Volume2005

Other

OtherDepartment of Defense High Performance Computing Modernization Program: HPCMP Users Group Conference 2005
CountryUnited States
CityNashville, TN
Period6/27/056/30/05

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Von Terzi, D. A., Sandberg, R. D., Sivasubramanian, J., & Fasel, H. F. (2005). High accuracy DNS and les of high reynolds number, supersonic base flows and passive control of the near wake. In DoD High Performance Computing Modernization Program: Proceedings of the HPCMP Users Group Conference 2005 (pp. 119-127). [1592132] (Department of Defense High Performance Computing Modernization Program: Proceedings of the HPCMP Users Group Conference 2005; Vol. 2005). https://doi.org/10.1109/DODUGC.2005.32