Experimental investigation of the rewetting process at pressures of 1-7 bar

Hinis, EP; Simopoulos, SE

dc.contributor.author	Hinis, EP	en
dc.contributor.author	Simopoulos, SE	en
dc.date.accessioned	2014-03-01T01:18:59Z
dc.date.available	2014-03-01T01:18:59Z
dc.date.issued	2003	en
dc.identifier.issn	0932-3902	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15300
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0037299684&partnerID=40&md5=6779dfe3b3867e0b97d52671f3ba71cd	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	Cooling	en
dc.subject.other	Interfaces (computer)	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Pressure	en
dc.subject.other	Steam	en
dc.subject.other	Two phase flow	en
dc.subject.other	Subcooling	en
dc.subject.other	Wetting	en
dc.title	Experimental investigation of the rewetting process at pressures of 1-7 bar	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Several water experiments have been carried out to investigate the physical mechanisms relevant to the rewetting phenomena either at atmospheric conditions or in a steam environment. Yet, there seems to be a scarcity of experimental data for the low pressure range from 2 to 7 bar with parameters the liquid film flowrate and the subcooling. An experimental facility to simulate two-phase low-pressure water flow phenomena has been designed, constructed and employed to investigate the rewetting process of hot surfaces in a water-steam environment at pressures in the above range, as well as at atmospheric conditions; the facility is on-line interfaced to computers which control its operation and undertake all the data acquisition tasks. Furthermore, a numerical method to experimentally evaluate the wet front position along the rod was introduced. The present paper describes the experimental work aimed at studying the wet front propagation along a stainless steel fuel rod, in a top-flooding environment in the pressure range of 1-7 bar, wall temperatures up to 550 degreesC and at a liquid flowrate of 10(-3) m(3) min(-1) at both saturated steam conditions and in atmospheric environment with water subcooling in the range 0-75K. The experimental results fitted well to an existing dimensionless rewetting correlation, together with world available vapour environment rewetting data extending its validity down to the pressure of 1 bar Furthermore, the effect of the inlet water subcooling was introduced in to this correlation.	en
heal.publisher	CARL HANSER VERLAG	en
heal.journalName	Kerntechnik	en
dc.identifier.isi	ISI:000181941500002	en
dc.identifier.volume	68	en
dc.identifier.issue	1-2	en
dc.identifier.spage	17	en
dc.identifier.epage	22	en