| Titre : | Experimental study on the delay of degradation of some drag-reducing polymer solutions by chemical additives | | Type de document : | texte imprimé | | Auteurs : | Bachir Khababa, Auteur ; Jacques lewalle, Directeur de thèse | | Editeur : | Syracuse University | | Année de publication : | 1985 | | Importance : | 109 f. | | Présentation : | ill. | | Format : | 27 cm. | | Note générale : | Mémoire de Magister : Génie Mécanique : New York, Syracuse University : 1985
Annexe f. 110 - 159 . Bibliogr. f. 160 - 164 | | Langues : | Anglais (eng) | | Mots-clés : | Drag reducing polymers ; Mechanical degradation ; Thermal degradation ; Chemical degradation ; Chemical additives | | Index. décimale : | M007485 | | Résumé : | This study deals with the phenomenon of drag reduction, in which the skin friction caused by turbulent flow of an ordinary liquid is reduced by additives.
This phenomenon, discovered about 1948, has received attention because it suggests practical benefits, such as increased pipeline capacities, reduced duct size, improved firefighting hoses, enhanced heating circuits, faster ships etc.
Our objective is to give a general review of what has been reported lately about drag reducing polymers and their loss of effectiveness and to find ways to delay the mechanical, thermal, and chemical degradations.
Emphasis has been given to the stabilization of polyacrylamide separan NP-10 solutions under the boiling point by using some chemical additives, such as formaldehyde, thiourea, sodium dithionite, sodium sulfite, and isopropyl alcohol.
Results obtained in our system, show that the antioxidant (formaldehyde, and thiourea) did give positive results.
However, the oxygen scavengers (sodiul sulfite, and sodium dithionite) accelerated the degradation more than was expected.
Results of the experiments show that the drag reduction by polyacrylamide is eliminated by addition of small amount of ferric nitrate with and without stabilizer.
Results also indicated and substantiated the need for further research in this area. |
Experimental study on the delay of degradation of some drag-reducing polymer solutions by chemical additives [texte imprimé] / Bachir Khababa, Auteur ; Jacques lewalle, Directeur de thèse . - [S.l.] : Syracuse University, 1985 . - 109 f. : ill. ; 27 cm. Mémoire de Magister : Génie Mécanique : New York, Syracuse University : 1985
Annexe f. 110 - 159 . Bibliogr. f. 160 - 164 Langues : Anglais ( eng) | Mots-clés : | Drag reducing polymers ; Mechanical degradation ; Thermal degradation ; Chemical degradation ; Chemical additives | | Index. décimale : | M007485 | | Résumé : | This study deals with the phenomenon of drag reduction, in which the skin friction caused by turbulent flow of an ordinary liquid is reduced by additives.
This phenomenon, discovered about 1948, has received attention because it suggests practical benefits, such as increased pipeline capacities, reduced duct size, improved firefighting hoses, enhanced heating circuits, faster ships etc.
Our objective is to give a general review of what has been reported lately about drag reducing polymers and their loss of effectiveness and to find ways to delay the mechanical, thermal, and chemical degradations.
Emphasis has been given to the stabilization of polyacrylamide separan NP-10 solutions under the boiling point by using some chemical additives, such as formaldehyde, thiourea, sodium dithionite, sodium sulfite, and isopropyl alcohol.
Results obtained in our system, show that the antioxidant (formaldehyde, and thiourea) did give positive results.
However, the oxygen scavengers (sodiul sulfite, and sodium dithionite) accelerated the degradation more than was expected.
Results of the experiments show that the drag reduction by polyacrylamide is eliminated by addition of small amount of ferric nitrate with and without stabilizer.
Results also indicated and substantiated the need for further research in this area. |
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