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Title: Subsonic flow past rotating bodies
Author: Sivaprakasapillai, Brahman
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1965
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This thesis describes an experimental investigation of the flow past a rotating circular cylinder placed in a wind stream. The cylinder was rotated about a diameter in its mid-plane, with the axis of rotation parallel to the wind stream. The Reynolds numbers at the different cross-sections were such as to have laminar separation of the flow from the cylinder surface. The investigation consisted of measuring the pressures and examining the streamlines at the cylinder surface. The object of the investigation was to obtain an understanding of the flow past a particular rotating body with a view to laying the framework for a better understanding of the flows past fans and propellers. The investigation revealed that the pressure profiles, at all sections, were asymmetrical about the stagnation point and that the peak suction pressure coefficients obtained at sections near the axis of rotation were much larger than those obtained on the stationary cylinder. It was also found that the radial component of velocity at the cylinder surface in the region of attached flow was small at all sections. Further, the pressure in the separated region was not uniform around the circumference. It is argued that the changes observed in the pressure profile, on rotating the cylinder, are due to secondary effects in the wake arising from the fluid being centrifuged towards the end of the cylinder.
Supervisor: Jackson, G.; Owen, P. R. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available