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Evaluation of the dynamic transfer matrix of cavitating inducers by means of a simplified “lumped-parameter” model / Angelo Cervone in Transactions of the ASME . Journal of fluids engineering, Vol. 131 N° 4 (Avril 2009) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 4 (Avril 2009) . - 09 p. Titre : Evaluation of the dynamic transfer matrix of cavitating inducers by means of a simplified “lumped-parameter” model Type de document : texte imprimé Auteurs : Angelo Cervone, Auteur ; Yoshinobu Tsujimoto, Auteur ; Yutaka Kawata, Auteur Année de publication : 2009 Article en page(s) : 09 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : pressure;  flow  rate  oscillations;  analytical  model;  axial  inducer  test  facility Résumé : The paper will present an analytical model for the evaluation of the pressure and flow rate oscillations in a given axial inducer test facility. The proposed reduced order model is based on several simplifying assumptions and takes into account the facility design and the dynamic properties of the tested inducer. The model has been used for evaluating the dynamic performance of a prototype of the LE-7 engine liquid oxygen (LOX) inducer, in tests carried out under given external flow rate excitations. The main results of these calculations will be shown, including the expected oscillations under a wide range of operational conditions and the influence of facility design. Calculations showed that the only way to obtain the two linearly independent test conditions, necessary for evaluating the inducer transfer matrix, is by changing the facility suction line: Any other changes in the facility design would result ineffective. Some other important design indications provided by the analytical model will be presented in the paper. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Evaluation of the dynamic transfer matrix of cavitating inducers by means of a simplified “lumped-parameter” model [texte imprimé] / Angelo Cervone, Auteur ; Yoshinobu Tsujimoto, Auteur ; Yutaka Kawata, Auteur . - 2009 . - 09 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 4 (Avril 2009) . - 09 p. Mots-clés : pressure;  flow  rate  oscillations;  analytical  model;  axial  inducer  test  facility Résumé : The paper will present an analytical model for the evaluation of the pressure and flow rate oscillations in a given axial inducer test facility. The proposed reduced order model is based on several simplifying assumptions and takes into account the facility design and the dynamic properties of the tested inducer. The model has been used for evaluating the dynamic performance of a prototype of the LE-7 engine liquid oxygen (LOX) inducer, in tests carried out under given external flow rate excitations. The main results of these calculations will be shown, including the expected oscillations under a wide range of operational conditions and the influence of facility design. Calculations showed that the only way to obtain the two linearly independent test conditions, necessary for evaluating the inducer transfer matrix, is by changing the facility suction line: Any other changes in the facility design would result ineffective. Some other important design indications provided by the analytical model will be presented in the paper. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]