Modelling of the tip clearance losses 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	2014-03-01T02:48:24Z
dc.date.available	2014-03-01T02:48:24Z
dc.date.issued	1996	en
dc.identifier.issn	04021215	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33802
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0029698549&partnerID=40&md5=3439be839776052bb70acd9a0492a448	en
dc.subject.other	Axial flow	en
dc.subject.other	Calculations	en
dc.subject.other	Computer simulation	en
dc.subject.other	Energy gap	en
dc.subject.other	Integration	en
dc.subject.other	Mathematical models	en
dc.subject.other	Pressure	en
dc.subject.other	Velocity	en
dc.subject.other	Viscosity	en
dc.subject.other	Flow field	en
dc.subject.other	Leakage vortex	en
dc.subject.other	Line vortex	en
dc.subject.other	Pressure losses distribution	en
dc.subject.other	Static pressure	en
dc.subject.other	Tip clearance losses	en
dc.subject.other	Vortex core control volume	en
dc.subject.other	Axial flow turbomachinery	en
dc.title	Modelling of the tip clearance losses in axial flow machines	en
heal.type	conferenceItem	en
heal.publicationDate	1996	en
heal.abstract	The possibility of predicting the total pressure loss radial distribution, due to the tip clearance presence, is examined. Models advanced for the diffusion of a line vortex are used for the simulation of the leakage vortex induced velocity and pressure fields, with sufficient success. The leakage vortex strength seems to control directly only a small part of the total pressure loss distribution, the one connected with the pressure deficit and the rotating flow. The remaining profiles result as functions of a free parameter - the constant of integration - and an assumption is needed to close the problem. The widely proposed observation for lost secondary jet kinetic energy is considered as a method of predicting the total amount of tip clearance loss in successive planes inside and downstream the blade passage.	en
heal.publisher	ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers (Paper)	en