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DNS of hypersonic flow over porous surfaces with a hybrid method

DNS of hypersonic flow over porous surfaces with a hybrid method
DNS of hypersonic flow over porous surfaces with a hybrid method
A numerical study is presented which investigates, through direct numerical simulation (DNS) of the Navier-Stokes equations, the characteristics of supersonic/hypersonic boundary layers over porous surfaces. Two different configurations are considered, namely a Mach 6 flow over a flat plate with periodic porosity in both the streamwise and spanwise directions, and a shock-boundary-layer-interaction (SBLI) case at Mach 2 with a localized porosity layer. The method used to carry out the numerical simulations consists of a 6th-order hybrid weighted-essentially-non-oscillatory/central-differencing (WENO-CD) scheme, which provides high numerical stability in the regions of strong gradients, while minimizing the numerical dissipation in smooth regions. A validation of the numerical code, by comparison with other high-order non-hybrid DNS codes is presented for both the configurations, as well as a grid convergence study. The effects of Reynolds number and wall cooling on the flow characteristics in the pore region and on the acoustic waves radiated by the pores are analyzed for the periodic porosity case. The role of a porosity region localized at two different streamwise positions along the flat plate on the bubble length, the mean flow features and the wall pressure is investigated for the SBLI configuration, and compared to the case of smooth wall. The results show the capabilities of the high-order finite-volume-based Cartesian-grid hybrid method in carrying out high-resolution simulations with relatively low computational cost, thus demonstrating its effciency andversatility for the DNS of multiscale hypersonic flow configurations over porous surfaces.
American Institute of Aeronautics and Astronautics
Cerminara, Adriano
6fd11181-c852-4558-82b5-5f7eac291a3f
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Sandham, Neil
0024d8cd-c788-4811-a470-57934fbdcf97
Cerminara, Adriano
6fd11181-c852-4558-82b5-5f7eac291a3f
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Sandham, Neil
0024d8cd-c788-4811-a470-57934fbdcf97

Cerminara, Adriano, Deiterding, Ralf and Sandham, Neil (2018) DNS of hypersonic flow over porous surfaces with a hybrid method. In 2018 AIAA Aerospace Sciences Meeting: AIAA SciTech Forum. American Institute of Aeronautics and Astronautics. 24 pp . (doi:10.2514/6.2018-0600).

Record type: Conference or Workshop Item (Paper)

Abstract

A numerical study is presented which investigates, through direct numerical simulation (DNS) of the Navier-Stokes equations, the characteristics of supersonic/hypersonic boundary layers over porous surfaces. Two different configurations are considered, namely a Mach 6 flow over a flat plate with periodic porosity in both the streamwise and spanwise directions, and a shock-boundary-layer-interaction (SBLI) case at Mach 2 with a localized porosity layer. The method used to carry out the numerical simulations consists of a 6th-order hybrid weighted-essentially-non-oscillatory/central-differencing (WENO-CD) scheme, which provides high numerical stability in the regions of strong gradients, while minimizing the numerical dissipation in smooth regions. A validation of the numerical code, by comparison with other high-order non-hybrid DNS codes is presented for both the configurations, as well as a grid convergence study. The effects of Reynolds number and wall cooling on the flow characteristics in the pore region and on the acoustic waves radiated by the pores are analyzed for the periodic porosity case. The role of a porosity region localized at two different streamwise positions along the flat plate on the bubble length, the mean flow features and the wall pressure is investigated for the SBLI configuration, and compared to the case of smooth wall. The results show the capabilities of the high-order finite-volume-based Cartesian-grid hybrid method in carrying out high-resolution simulations with relatively low computational cost, thus demonstrating its effciency andversatility for the DNS of multiscale hypersonic flow configurations over porous surfaces.

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e-pub ahead of print date: 7 January 2018
Published date: 8 January 2018
Venue - Dates: 2018 AIAA Aerospace Sciences Meeting, Kissimmee, United States, 2018-01-08 - 2018-01-12

Identifiers

Local EPrints ID: 417772
URI: https://eprints.soton.ac.uk/id/eprint/417772
PURE UUID: bbe87a4c-accc-426d-8096-ffcc67bbdb84
ORCID for Ralf Deiterding: ORCID iD orcid.org/0000-0003-4776-8183
ORCID for Neil Sandham: ORCID iD orcid.org/0000-0002-5107-0944

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Date deposited: 13 Feb 2018 17:30
Last modified: 14 Mar 2019 01:49

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Contributors

Author: Adriano Cerminara
Author: Ralf Deiterding ORCID iD
Author: Neil Sandham ORCID iD

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