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Reference Number EP/I016015/1
Title Control of boundary layer streaks induced by free-stream turbulence using a novel velocity-pressure control framework.
Status Completed
Energy Categories ENERGY EFFICIENCY(Transport) 20%;
RENEWABLE ENERGY SOURCES(Wind Energy) 5%;
OTHER POWER and STORAGE TECHNOLOGIES(Electric power conversion) 5%;
NOT ENERGY RELATED 70%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr G (George ) Papadakis
No email address given
Aeronautics
Imperial College London
Award Type Standard
Funding Source EPSRC
Start Date 01 September 2011
End Date 31 August 2014
Duration 36 months
Total Grant Value £374,395
Industrial Sectors No relevance to Underpinning Sectors
Region London
Programme NC : Engineering
 
Investigators Principal Investigator Dr G (George ) Papadakis , Aeronautics, Imperial College London (99.999%)
  Other Investigator Dr P (Pierre ) Ricco , Mechanical Engineering, University of Sheffield (0.001%)
Web Site
Objectives Linked to grant EP/I016090/1
Abstract In this proposal we aim to develop a new framework for active control of spatially developing flows and apply it to stabilise the streaky structures developing in incompressible and compressible boundary layers in the presence of high free-stream turbulence. This flow scenario is very common over aircraft wings and turbine blades. To the best of our knowledge, this is the first time that active control of such flows is attempted worldwide. The current approach, which is based on the wall-normal velocity and vorticity formulation to derive a state-space system suitable for controller design, has several limitations. The new control framework will use instead the primitive variables, velocity and pressure. This formulation offers greater flexibility and, most importantly, makes the incorporation of the effect of free-stream turbulence straightforward. This choice of variables however introduces new challenges from the control perspective because the standard optimal control algorithms can not be applied. In the attached case of support, the limitations of the current approach are explained, the benefits of the new formulation are highlighted and the challenges that must be dealt with for the successful control of streaks are analysed. This work offers a unique opportunity to put the UK in a leading position in the new and rapidly developing area of active flow control
Publications (none)
Final Report (none)
Added to Database 06/12/10