Investigation of alternative drag-reduction strategies in turbulent boundary layers by using wall forcing
Lead Research Organisation:
University of Warwick
Department Name: Sch of Engineering
Abstract
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Publications
Blesbois O
(2013)
Pattern prediction by linear analysis of turbulent flow with drag reduction by wall oscillation
in Journal of Fluid Mechanics
Carlos Duque-Daza (Author)
(2012)
Linear modeling of turbulent skin-friction reduction due to spanwise wall motion
Duque C
(2011)
Modelling turbulent skin-friction control using linearised Navier-Stokes equations
in Journal of Physics: Conference Series
Duque Daza Carlos Alberto
(2012)
Low order modelling of flow-control techniques for turbulent skin-friction reduction
Duque-Daza C
(2012)
Modelling turbulent skin-friction control using linearized Navier-Stokes equations
in Journal of Fluid Mechanics
Hurst E
(2014)
The effect of Reynolds number on turbulent drag reduction by streamwise travelling waves
in Journal of Fluid Mechanics
Mathis R
(2013)
Estimating wall-shear-stress fluctuations given an outer region input
in Journal of Fluid Mechanics
Pearce N
(2012)
An experimental study into the effects of streamwise and spanwise acceleration in a turbulent boundary layer
in Experiments in Fluids
Thomas C
(2011)
The linear stability of oscillatory Poiseuille flow in channels and pipes
in Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Togneri M
(2011)
A high order finite-difference solver for investigation of disturbance development in turbulent boundary layers
in Computers & Fluids
| Description | The project developed a novel and computationally efficient linear model for predicting turbulent drag reduction resulting from open-loop control strategies. The striking success of this highly-efficient approach opens opportunities for exploring new and transformative means of reducing drag (and therefore emissions) in high-speed transportation. The linear model's success also reveals key information about the characteristics of the drag-reduction mechanism for this popular control strategy. The outcomes of the project provide insight into the effectiveness of open-loop control strategies at speeds and scales relevant to the aerospace industry. |
| Exploitation Route | The linear model developed in this project can facilitate the design of surfaces and flow-control systems that have the potential to drastically reduce drag on aircraft, marine vessels, trains, and any other high-speed transportation. The simulation capabilities developed in the project can be used to search for new and highly-efficient means of reducing drag for high-speed transportation, either by active (powered) or passive means. For example, the simulations can be used to design aerodynamic surface topologies that suppress turbulent drag production. |
| Sectors | Energy,Environment,Transport |