Prediction of the tip clearance vortex circulation and its induced flow field in axial flow machines

Nikolos, IK; Douvikas, DI; Papailiou, KD

dc.contributor.author	Nikolos, IK	en
dc.contributor.author	Douvikas, DI	en
dc.contributor.author	Papailiou, KD	en
dc.date.accessioned	2014-03-01T02:48:26Z
dc.date.available	2014-03-01T02:48:26Z
dc.date.issued	1996	en
dc.identifier.issn	04021215	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33805
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-18544404478&partnerID=40&md5=951d963a2beb82cfcfa5af1ee49fa3d0	en
dc.subject.other	Axial flow	en
dc.subject.other	Calculations	en
dc.subject.other	Compressors	en
dc.subject.other	Discharge (fluid mechanics)	en
dc.subject.other	Gas turbines	en
dc.subject.other	Jets	en
dc.subject.other	Mathematical models	en
dc.subject.other	Velocity	en
dc.subject.other	Vortex flow	en
dc.subject.other	Blade camber angle	en
dc.subject.other	Flow field	en
dc.subject.other	Leakage vortex circulation	en
dc.subject.other	Static pressure	en
dc.subject.other	Vortex control volume	en
dc.subject.other	Vortex trace	en
dc.subject.other	Axial flow turbomachinery	en
dc.title	Prediction of the tip clearance vortex circulation and its induced flow field in axial flow machines	en
heal.type	conferenceItem	en
heal.publicationDate	1996	en
heal.abstract	A model for the prediction of the leakage vortex circulation was developed, based on the assumption that the leakage jet flow enters as a whole the vortex core, increasing its radius and its moment of momentum in the direction of the vortex axis. Using the assumption that the leakage vortex has a solid body rotation, an expression was derived for the vortex circulation, which demonstrates that this circulation is proportional to the square root of the corresponding tip clearance height. This theoretical result is supported by the available experimental data for both compressors and turbines. A simple model was developed, which demonstrates the ability of the proposed theory to calculate the leakage vortex circulation, provided that the vortex trace is known.	en
heal.publisher	ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers (Paper)	en