Ziel
Reynolds stress is the most important quantity affecting the mean flow as it is responsible for a major part of the momentum transfer in the wall bounded turbulent flow. It has a direct relevance to both skin friction and flow separation. Manipulation of the Reynolds stress can directly lead to changes in the viscous stress at the wall so as to effectively control the flow for effective flow control.
However, there is a lack of current understanding of the inter-relationship between the various flow control devices and the Reynolds stresses in the flow field they produced. An improved understanding can potentially significantly improve the effectiveness of flow control as the Reynolds stresses are closely related to the flow behaviour at the surface for effective separation control or drag reduction. A variety of control devices are available and new ones are invented but which one for what purpose is an open question yet to be fully answered.
MARS proposal proposes to reverse that process and consider the long term goal of controlling dynamic structures that influence the Reynolds stress that changes the mean flow. This radical approach recognises we are still some way away from hardware to implement it at flight scales but if successful, would establish a first important step towards our ultimate ambition.
The focus of MARS will be on the effects of a number of active flow control devices on the discrete dynamic components of the turbulent shear layers and the Reynolds stress. From the application point of view, MARS provides a positive and necessary step in the right direction wherein it will demonstrate the capability to control individual structures that are larger in scale and lower in frequency compared to the richness of the time and spatial scales in a turbulent boundary layer. MARS will investigate active flow control means rather than passive controls.
Wissenschaftliches Gebiet
Programm/Programme
Aufforderung zur Vorschlagseinreichung
FP7-AAT-2010-RTD-CHINA
Andere Projekte für diesen Aufruf anzeigen
Finanzierungsplan
CP-FP - Small or medium-scale focused research projectKoordinator
08034 Barcelona
Spanien
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Beteiligte (18)
S10 2TN Sheffield
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28906 Getafe
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164 90 Stockholm
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00195 Roma
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51147 Koln
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75794 Paris
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75008 Paris
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1170 Bruxelles / Brussel
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M13 9PL Manchester
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78153 Le Chesnay Cedex
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WC2R 0AP London
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210016 Nanjing
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100084 BEIJING
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710072 XI AN
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100871 BEIJING
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100083 BEIJING
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310027 HANGZHOU
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100012 BEIJING
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