Details of Grant 

EPSRC Reference:	GR/S27443/01
Title:	DARP: Highly Swept Leading Edge Separations - Experimental Investigations
Principal Investigator:	Turner, Dr JT
Other Investigators:	Jaworski, Professor AJ Wood, Professor NJ
Researcher Co-Investigators:
Project Partners:	BAE Systems QinetiQ Rolls-Royce Plc (UK)
Department:	Mechanical Aerospace and Civil Eng
Organisation:	University of Manchester, The
Scheme:	Standard Research (Pre-FEC)
Starts:	01 April 2003	Ends:	30 September 2006	Value (£):	241,038
EPSRC Research Topic Classifications:	Aerodynamics
EPSRC Industrial Sector Classifications:	Aerospace, Defence and Marine
Related Grants:	GR/S27467/01 GR/S27436/01 GR/S27450/01 GR/S27474/01
Panel History:
Summary on Grant Application Form
The flow over a highly-swept wing at incidence is characterised by separation from the leading edge which may be of the closed (bubble) or the open (vortex) type, depending upon the sweep angle, the boundary between the two types not being distinct. At the separation line, the flow may or may not be turbulent. Contamination from the spanwise motion favours transition on attachment but, close to the wing root (or apex), transition may occur in the separated shear layer. For vortex separation, the flow above the wing is highly swirling and hence the body forces make the vortex subcritical and strongly damp turbulence and the vortex spreading rate. Secondary separation zones also arise, adding to the flow complexity and creating difficult experimental conditions. At present, there are no theoretical models capable of predicting such separation, nor can the nature of these changes in the flow behaviour be convincingly explained. An experimental program will perform a systematic investigation of the separation using the most advanced non-intrusive optical instrumentation in order to produce detailed information about the flow field. The program will also improve physical understanding of the flow structures and their changes and formulate a quantitative model based on the global balance of vorticity, explaining changes between the two flow regimes. Finally, a comprehensive experimental database will be constructed for validation of CFD codes developed by collaborating institution.
Key Findings
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Further Information:
Organisation Website:	http://www.man.ac.uk