Theoretical modelling of relative wall motion effects in tip leakage flow

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	2014-03-01T02:48:21Z
dc.date.available	2014-03-01T02:48:21Z
dc.date.issued	1995	en
dc.identifier.issn	04021215	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33749
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0029217981&partnerID=40&md5=7a69e0277d9cd8ac419a136507a71aa8	en
dc.subject.other	Calculations	en
dc.subject.other	Compressors	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Leakage (fluid)	en
dc.subject.other	Mathematical models	en
dc.subject.other	Pressure	en
dc.subject.other	Rotors	en
dc.subject.other	Turbomachine blades	en
dc.subject.other	Wall flow	en
dc.subject.other	Contraction ratio	en
dc.subject.other	Flow velocity	en
dc.subject.other	Mass flow rate	en
dc.subject.other	Relative wall motion effects	en
dc.subject.other	Tip clearance	en
dc.subject.other	Tip leakage flow	en
dc.subject.other	Gas turbines	en
dc.title	Theoretical modelling of relative wall motion effects in tip leakage flow	en
heal.type	conferenceItem	en
heal.publicationDate	1995	en
heal.abstract	The influence of relative wall motion in modifying the leakage flow through the tip clearance is investigated. A theoretical model is developed, in order to calculate the mass flow rate through the gap. The physical mechanism by which relative wall motion affects the leakage flow is analyzed and the differences between the turbine and compressor case are identified. This model, being an extension of an already existing one, not taking into account relative wall motion, is incorporated into the tip clearance calculation procedure, already developed by the authors. Theoretical results of the complete calculation procedure (secondary flow plus tip clearance model) are compared with experimental data, for the case of compressor and turbine cascades, as well as for the case of a single rotor. Good agreement between theory and experiment is obtained.	en
heal.publisher	ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers (Paper)	en