Documents disponibles écrits par cet auteur

Effect of macroinstabilities in single- and multiple-impeller stirred tanks / Alessandro Paglianti in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4944–4952 Titre : Effect of macroinstabilities in single- and multiple-impeller stirred tanks Type de document : texte imprimé Auteurs : Alessandro Paglianti, Auteur ; Zuohua Liu, Auteur ; Giuseppina Montante, Auteur ; Franco Magelli, Auteur Année de publication : 2008 Article en page(s) : p. 4944–4952 Langues : Anglais (eng) Mots-clés : Macroinstabilities;  Stirred  tanks Résumé : In this work, a simplified analysis of the features of macroinstabilities in stirred tanks is proposed. The experimental part of the study is based on the collection of time series acquired by pressure transducers placed on the tank wall. The measurements are not invasive, because of the probe position, and they can be easily performed in laboratory and in industrial equipment, due to the instrumentation characteristics. With respect to previous investigations, the experimental analysis is extended from Rushton and pitched-blade turbines to Chemineer BT-6 and the effect of multiple impellers (MIs) is considered. The MI presence, frequency, velocity, and strength are obtained from the analysis of the collected pressure time traces; simplified correlations for their prediction are proposed. Finally, the dynamic pressure components associated to the MIs are presented, and a simplified model to assess their importance with respect to those produced by the blade passage frequency is suggested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800253u [article] Effect of macroinstabilities in single- and multiple-impeller stirred tanks [texte imprimé] / Alessandro Paglianti, Auteur ; Zuohua Liu, Auteur ; Giuseppina Montante, Auteur ; Franco Magelli, Auteur . - 2008 . - p. 4944–4952. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4944–4952 Mots-clés : Macroinstabilities;  Stirred  tanks Résumé : In this work, a simplified analysis of the features of macroinstabilities in stirred tanks is proposed. The experimental part of the study is based on the collection of time series acquired by pressure transducers placed on the tank wall. The measurements are not invasive, because of the probe position, and they can be easily performed in laboratory and in industrial equipment, due to the instrumentation characteristics. With respect to previous investigations, the experimental analysis is extended from Rushton and pitched-blade turbines to Chemineer BT-6 and the effect of multiple impellers (MIs) is considered. The MI presence, frequency, velocity, and strength are obtained from the analysis of the collected pressure time traces; simplified correlations for their prediction are proposed. Finally, the dynamic pressure components associated to the MIs are presented, and a simplified model to assess their importance with respect to those produced by the blade passage frequency is suggested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800253u