Numerical investigation of transitional supersonic base flows with flow control

Sivasubramanian, Jayahar, Sandberg, Richard D., von Terzi, Dominic A. and Fasel, Hermann F. (2007) Numerical investigation of transitional supersonic base flows with flow control. Journal of Spacecraft and Rockets, 44 (5), 1021-1028. (doi:10.2514/1.28673).

Abstract

Drag reduction by means of flow control is investigated for
supersonic base flows at Mach number M = 2.46 using Direct
Numerical Simulations (DNS) and the Flow Simulation Methodology
(FSM). The objective of the present work is to understand the
evolution of coherent structures in the flow and how flow control
techniques modify these structures. For such investigations,
simulation methods that capture the dynamics of the large turbulent
structures are required. DNS are performed for transitional base
flows at Re_D = 30,000. Due to the drastically increased
computational cost of DNS at higher Reynolds numbers, a hybrid
RANS/LES method (FSM) is applied to simulate base flows with flow
control at Re_D = 100,000. Active and passive flow control
techniques that alter the near-wake by introducing axisymmetric and
longitudinal perturbations are investigated. A detailed analysis of
the dynamics of the resulting turbulent (coherent) structures is
presented.

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Contributors

Author: Richard D. Sandberg

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