The influence of heat transfer effects on turbine performance characteristics

Stamatis, AG; Mathioudakis, K

dc.contributor.author	Stamatis, AG	en
dc.contributor.author	Mathioudakis, K	en
dc.date.accessioned	2014-03-01T02:50:54Z
dc.date.available	2014-03-01T02:50:54Z
dc.date.issued	2006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35198
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33750863990&partnerID=40&md5=3c04588b635fc0f479b4f635dc5a1d3f	en
dc.subject.other	Boundary layers	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Mathematical models	en
dc.subject.other	Thermal expansion	en
dc.subject.other	Turbines	en
dc.subject.other	Turbomachine blades	en
dc.subject.other	Flow fields	en
dc.subject.other	Hot gas temperature	en
dc.subject.other	Turbine blades	en
dc.subject.other	Turbine performance	en
dc.subject.other	Heat transfer	en
dc.title	The influence of heat transfer effects on turbine performance characteristics	en
heal.type	conferenceItem	en
heal.publicationDate	2006	en
heal.abstract	A method allowing the evaluation of the effects related to heat transfer to the turbine blades on its performance characteristics is presented. The effects investigated are the change of passage dimensions, resulting from heat transfer and the change in flow field, exhibited mainly as a different boundary layer development. Change of hot gas temperature combined with cooling air temperature and possibly flow rate, result in a change of the temperature of the blade material, leading to dimension changes, because of the thermal expansion (dilatation). The changes in dimensions have a direct effect on turbine performance. An immediate consequence is a modification of the mass flow characteristic, due to a change of the throat area. Heat transfer also influences the properties of the gas flowing through the passage and in particular the characteristics of the boundary layers developing on the nozzle vanes and hub, tip endwals. Change of the thickness of this layer results in a change of blockage through the passage, a fact that influences directly the turbine flow function. The influence of both effects on turbine performance is studied. The study is performance oriented, aiming to the derivation of simplified models, which can be introduced in engine cycle decks Copyright © 2006 by ASME.	en
heal.journalName	Proceedings of the ASME Turbo Expo	en
dc.identifier.volume	3 PART A	en
dc.identifier.spage	829	en
dc.identifier.epage	838	en