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EPSRC Reference: EP/C536207/1
Title: An Experimental Study of Unsteady Wake-Induced Boundary Layer Transition in Turbomachinery
Principal Investigator: Hodson, Professor H
Other Investigators:
Zhong, Professor S
Researcher Co-Investigators:
Project Partners:
Alstom Group Rolls-Royce Plc Siemens
Department: Engineering
Organisation: University of Cambridge
Scheme: Standard Research (Pre-FEC)
Starts: 01 October 2005 Ends: 31 March 2009 Value (£): 171,248
EPSRC Research Topic Classifications:
Aerodynamics
EPSRC Industrial Sector Classifications:
Aerospace, Defence and Marine
Related Grants:
EP/C536215/1
Panel History:  
Summary on Grant Application Form
Wake-induced transition typically occurs in multi-stage turbomachine. It affects the aerodynamic performance of turbine and compressor blades considerably. Although the various mechanisms of wake-induced transition have now been identified, the detailed processes are not yet understood. In this joint proposal, the University of Manchester will use a novel combination of PIV and liquid crystal flow visualization technique to conduct detailed measurements of wake-induced transitional events occurring in an attached laminar boundary layer and a separated boundary layer with a separation bubble. The University of Cambridge will use bar-passing cascades to study the breakdown mechanism initiated by incoming wakes in separated boundary layers and in the mixed-mode region of transitory separated/attached boundary layers that can arise when wake-induced transition begins before but is not complete by the point of laminar separation. The aims are to obtain a better understanding of the mechanisms of wake-induced transition in attached, separating and separated flows and to provide benchmark quality data for developing and validating computational models.
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Organisation Website: http://www.cam.ac.uk