Documents disponibles écrits par cet auteur

Experimental test rig with results on liquid atomization by slinger injectors / Carmen Sescu in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 11 (Novembre 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 11 (Novembre 2011) . - 04 p. Titre : Experimental test rig with results on liquid atomization by slinger injectors Type de document : texte imprimé Auteurs : Carmen Sescu, Auteur ; Bogdan R. Kucinschi, Auteur ; Abdollah A. Afjeh, Auteur Année de publication : 2012 Article en page(s) : 04 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Drops  Fuel  systems  Gas  turbines Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this work, a rotary atomizer, referred to as a slinger injector, is investigated. An experimental setup has been designed to model the environment of the combustion chamber, and an optical measurement system has been implemented to analyze the liquid atomization provided by the slinger injector. In actual small gas turbines, a critical aspect is related to the start-up phase, which typically takes place at speeds around 10,000 rpm. The main scope of this research was to study the liquid spray at relatively low velocities. The primary breakup visualization, breakup length measurement, and droplet size measurement were performed for different rotational speeds. Several pictures of liquid breakup are included, and various mean and representative diameters are presented. In addition, drop size histograms and cumulative volume distribution curves are also included. The results show a decrease in both the breakup length and the mean droplet sizes with increasing rotational speed. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] [article] Experimental test rig with results on liquid atomization by slinger injectors [texte imprimé] / Carmen Sescu, Auteur ; Bogdan R. Kucinschi, Auteur ; Abdollah A. Afjeh, Auteur . - 2012 . - 04 p. Génie Mécanique Langues : Anglais (eng) in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 11 (Novembre 2011) . - 04 p. Mots-clés : Drops  Fuel  systems  Gas  turbines Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this work, a rotary atomizer, referred to as a slinger injector, is investigated. An experimental setup has been designed to model the environment of the combustion chamber, and an optical measurement system has been implemented to analyze the liquid atomization provided by the slinger injector. In actual small gas turbines, a critical aspect is related to the start-up phase, which typically takes place at speeds around 10,000 rpm. The main scope of this research was to study the liquid spray at relatively low velocities. The primary breakup visualization, breakup length measurement, and droplet size measurement were performed for different rotational speeds. Several pictures of liquid breakup are included, and various mean and representative diameters are presented. In addition, drop size histograms and cumulative volume distribution curves are also included. The results show a decrease in both the breakup length and the mean droplet sizes with increasing rotational speed. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...]

A lattice-Boltzmann approach to fluid film lubrication / Bogdan R. Kucinschi in Transactions of the ASME . Journal of tribology, Vol. 132 N° 2 (Avril 2010) 

Public ISBD [article]  in Transactions of the ASME . Journal of tribology > Vol. 132 N° 2 (Avril 2010) . - 07 p. Titre : A lattice-Boltzmann approach to fluid film lubrication Type de document : texte imprimé Auteurs : Bogdan R. Kucinschi, Auteur ; Abdollah A. Afjeh, Auteur Année de publication : 2011 Article en page(s) : 07 p. Note générale : Tribology Langues : Anglais (eng) Mots-clés : Cavitation  Film  flow  Lattice  Boltzmann  methods  Lubrication  Navier-Stokes  equations  Relaxation  theory Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper deals with the application of the lattice-Boltzmann method (LBM) to fluid-film lubrication. Compared with the traditional computational approach in lubrication (based on Reynolds equation), LBM does not neglect inertia forces. The implementation of LBM is less demanding than that of the Navier–Stokes solvers for complex geometric configurations. Various wall boundary conditions, as well as the multiple relaxation time model, are discussed. Bearing cavitation is approached in a simplified manner. The LBM solutions for two classic configurations are compared with the corresponding analytic and numeric solutions of the Reynolds or Navier–Stokes equations. The LBM results were satisfactory for the investigated cases. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...] [article] A lattice-Boltzmann approach to fluid film lubrication [texte imprimé] / Bogdan R. Kucinschi, Auteur ; Abdollah A. Afjeh, Auteur . - 2011 . - 07 p. Tribology Langues : Anglais (eng) in Transactions of the ASME . Journal of tribology > Vol. 132 N° 2 (Avril 2010) . - 07 p. Mots-clés : Cavitation  Film  flow  Lattice  Boltzmann  methods  Lubrication  Navier-Stokes  equations  Relaxation  theory Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper deals with the application of the lattice-Boltzmann method (LBM) to fluid-film lubrication. Compared with the traditional computational approach in lubrication (based on Reynolds equation), LBM does not neglect inertia forces. The implementation of LBM is less demanding than that of the Navier–Stokes solvers for complex geometric configurations. Various wall boundary conditions, as well as the multiple relaxation time model, are discussed. Bearing cavitation is approached in a simplified manner. The LBM solutions for two classic configurations are compared with the corresponding analytic and numeric solutions of the Reynolds or Navier–Stokes equations. The LBM results were satisfactory for the investigated cases. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...]