Swirl center precession in engine flows

dc.contributor.author	Αρκουμάνης, Κ.	el
dc.contributor.author	Χατζηαποστόλου, Αντώνιος	el
dc.contributor.author	Whitelaw, J.H.	en
dc.date.accessioned	2015-05-03T17:27:19Z
dc.date.issued	2015-05-03
dc.identifier.uri	http://hdl.handle.net/11400/9594
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://papers.sae.org/	en
dc.subject	Fuels and Energy Sources
dc.subject	Engine cylinders
dc.subject	Pistons
dc.subject	Καύσιμα και Πηγές Ενέργειας
dc.subject	Κύλινδροι κινητήρα
dc.subject	Έμβολα
dc.title	Swirl center precession in engine flows	en
heal.type	journalArticle
heal.classification	Technology
heal.classification	Engineering
heal.classification	Τεχνολογία
heal.classification	Μηχανική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/19795-3
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Μηχανική
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85102475
heal.identifier.secondary	doi:10.4271/87037
heal.dateAvailable	10000-01-01
heal.language	en
heal.access	forever
heal.publicationDate	1987-02-01
heal.bibliographicCitation	ARCOUMANIS, C., HADJIAPOSTOLOU, A. & WHITELAW, J.H. (1987). Swirl center precession in engine flows. SAE International. [Online]. Technical Paper 870370. Available from: http://papers.sae.org/	en
heal.abstract	The origin and development of swirl center precession in engine flows has been investigated in a steady flow rig, with and without a porous plate simulating a stationary piston, and in a model engine motored at 200rpm; swirl, in all cases, was generated by means of 60° vanes located in the axisymmetric inlet port. The swirl center performs a helical motion that originates as an instability in the forced-vortex core from its interaction with the axial flow at a free stagnation point and develops in the engine from the piston towards the cylinder head; an opposite trend has been observed in the steady flow case with the open-ended cylinder. In the ensemble-averaged measurements, swirl center precession has been identified by the increased tangential velocity fluctuations around the off-centre zero swirl velocity. The characteristic frequency of the periodic swirl center motion was found to scale linearly with induction air mass flowrate over the investigated range of engine speeds (180-700rpm).	en
heal.publisher	Society of Automotive Engineers, Inc.	en
heal.journalName	SAE International	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	false