TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
New Calculation Method for Biphasic Gas-Water Flows through Pipes
(Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti, 39, Ploieşti e-mail: ctrifan@upg-ploiesti.ro)
Vol LX • No. 1/2008
Silviu Al. Stan, Alecsandru D. Stan, Cornel Trifan
Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti, 39, Ploieşti
e-mail: ctrifan@upg-ploiesti.ro

 Keywords   biphasic flow, pressure falls, Reynolds number, laminar, turbulent

 Abstract
Generally speaking, when transporting natural gas through pipelines high quantities of water may occur, this giving the mixture a biphasic character. There are several theories on biphasic transport, but they have certain limits or are applied only using empirical coefficients whose valability is unnsure. The method proposed by the paper, even if using one of Baker's ideas, is an exact one and does not require experimental numerical coefficients. The method uses hydraulic resistance coefficients for monofhasic flow in pipelines, no matter the type of movement (laminar or turbulent) or the hydraulic nature of the pipeline (flat, semi-flat or completely rugose).

 Rezumat
În general, la transportul gazelor naturale prin conducte apar şi cantităţi mari de apă, ceea ce conferă acestui amestec un caracter bifazic. Există mai multe teorii privind transportul bifazic, dar, acestea au anumite limite sau sunt aplicabile utilizând coeficienţi empirici ai căror valabilitate este incertă. Metoda propusă în lucrare, deşi utilizează o idee a lui Baker, este exactă şi nu necesită utilizarea unor coeficienţi numerici de natură experimentală. În cazul metodei propuse sunt utilizaţi coeficienţi de rezistenţă hidraulică pentru curgerea monofazică prin conducte indiferent de caracterul mişcării (laminar, turbulent) sau natura hidraulică a conductei (netedă, seminetedă sau complet rugoasă).




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