Documents disponibles écrits par cet auteur

Convective heat transfer in a rotor stator system air gap with multiple suctions of fluid through the stator / Julien Pellé in Journal of heat transfer, Vol. 133 N° 7 (Juillet 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [071707/1-9] Titre : Convective heat transfer in a rotor stator system air gap with multiple suctions of fluid through the stator Type de document : texte imprimé Auteurs : Julien Pellé, Auteur ; Souad Harmand, Auteur Année de publication : 2011 Article en page(s) : pp. [071707/1-9] Note générale : Physique Langues : Anglais (eng) Mots-clés : Convective  heat  transfer  Rotor  stator  systems  Infrared  thermography Index. décimale : 536 Chaleur. Thermodynamique Résumé : The experimental work presented in this paper relates to the local convective heat transfer on the rotor surface in the airgap of a discoidal rotor stator system. The stator used in these experiments is a multiperforated disk in which an air suction due to the rotation of the rotor comes through and enters the airgap. A thermal balance equation was used to identify the local convective heat transfer coefficient, with temperatures as boundary conditions, which have been measured by infrared thermography. The influence of the suctions is discussed for an interdisk dimensionless spacing interval G ranging from 0.01 to 0.16 and for Re between 129,000 and 516,000. Results are compared with precedent studies in which we obtained Nusselt numbers with a closed rotor stator system in which stator is a full disk and a rotor stator system with one hole at the stator center. It is shown that multiperforated stator can or cannot improve the rotor cooling, depending on G and Re. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...] [article] Convective heat transfer in a rotor stator system air gap with multiple suctions of fluid through the stator [texte imprimé] / Julien Pellé, Auteur ; Souad Harmand, Auteur . - 2011 . - pp. [071707/1-9]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [071707/1-9] Mots-clés : Convective  heat  transfer  Rotor  stator  systems  Infrared  thermography Index. décimale : 536 Chaleur. Thermodynamique Résumé : The experimental work presented in this paper relates to the local convective heat transfer on the rotor surface in the airgap of a discoidal rotor stator system. The stator used in these experiments is a multiperforated disk in which an air suction due to the rotation of the rotor comes through and enters the airgap. A thermal balance equation was used to identify the local convective heat transfer coefficient, with temperatures as boundary conditions, which have been measured by infrared thermography. The influence of the suctions is discussed for an interdisk dimensionless spacing interval G ranging from 0.01 to 0.16 and for Re between 129,000 and 516,000. Results are compared with precedent studies in which we obtained Nusselt numbers with a closed rotor stator system in which stator is a full disk and a rotor stator system with one hole at the stator center. It is shown that multiperforated stator can or cannot improve the rotor cooling, depending on G and Re. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...]

Convective heat transfer in a rotor–stator system airgap with a centered natural suction of fluid / Julien Pellé in Journal of heat transfer, Vol. 133 N° 11 (Novembre 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 11 (Novembre 2011) . - pp. [111702/1-9] Titre : Convective heat transfer in a rotor–stator system airgap with a centered natural suction of fluid Type de document : texte imprimé Auteurs : Julien Pellé, Auteur ; Souad Harmand, Auteur Année de publication : 2012 Article en page(s) : pp. [111702/1-9] Note générale : Physique Langues : Anglais (eng) Mots-clés : convection  heat  transfer  Rotor-stator  syetems  Infrared  thermography  Natural  suction Index. décimale : 536 Chaleur. Thermodynamique Résumé : The present work relates to an experimental study of the local convective heat transfer over the rotor surface in the air-gap of a discoidal rotor–stator system. This configuration is of interest namely, in electrical machines or tubomachinery. Following precedent studies obtained for a single rotating disk or a closed (but unshrouded) rotor–stator system, an air suction comes through the stator and enters the air-gap in this particular work. Determination of Nusselt numbers is based on the use of infrared thermography. The influence of the suction is discussed for an interdisk dimensionless spacing interval, G ranging from 0.01 to 0.16 and for a rotational Reynolds number, Re between 30,000 and 5,16,000. Results shows that the suction could locally provide better cooling than in the closed rotor–stator and in the single disk configurations, even if the main influence is a decrease in the convective heat transfer. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000133000011 [...] [article] Convective heat transfer in a rotor–stator system airgap with a centered natural suction of fluid [texte imprimé] / Julien Pellé, Auteur ; Souad Harmand, Auteur . - 2012 . - pp. [111702/1-9]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 11 (Novembre 2011) . - pp. [111702/1-9] Mots-clés : convection  heat  transfer  Rotor-stator  syetems  Infrared  thermography  Natural  suction Index. décimale : 536 Chaleur. Thermodynamique Résumé : The present work relates to an experimental study of the local convective heat transfer over the rotor surface in the air-gap of a discoidal rotor–stator system. This configuration is of interest namely, in electrical machines or tubomachinery. Following precedent studies obtained for a single rotating disk or a closed (but unshrouded) rotor–stator system, an air suction comes through the stator and enters the air-gap in this particular work. Determination of Nusselt numbers is based on the use of infrared thermography. The influence of the suction is discussed for an interdisk dimensionless spacing interval, G ranging from 0.01 to 0.16 and for a rotational Reynolds number, Re between 30,000 and 5,16,000. Results shows that the suction could locally provide better cooling than in the closed rotor–stator and in the single disk configurations, even if the main influence is a decrease in the convective heat transfer. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000133000011 [...]

Convective heat transfer on a rotating disk with transverse air crossflow / Benjamin Latour in Journal of heat transfer, Vol. 133 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 2 (Fevrier 2011) . - pp. [021702/1-10] Titre : Convective heat transfer on a rotating disk with transverse air crossflow Type de document : texte imprimé Auteurs : Benjamin Latour, Auteur ; Pascale Bouvier, Auteur ; Souad Harmand, Auteur Année de publication : 2011 Article en page(s) : pp. [021702/1-10] Note générale : Physique Langues : Anglais (eng) Mots-clés : Rotating  fins  Air  crossflow  Forced  convection  Local  heat  transfer  Infrared  thermography Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, the local convective heat transfer from a rotating disk with a transverse air crossflow was evaluated using an infrared thermographic experimental setup. Solving the inverse conduction heat transfer problem allows the local convective heat transfer coefficient to be identified. We used the specification function method along with spatio-temporal regularization to develop a model of local convective heat transfer in order to take lateral conduction and 2D geometry into account. This model was tested using rotational Reynolds numbers (based on the cylinder diameter and the peripheral speed) between 0 and 17,200 and air crossflow Reynolds numbers between 0 and 39,600. In this paper, the distribution of the local heat transfer on the disk allows us to observe the combined effect of the rotation and air crossflow on heat exchanges. This coupling is able to be taken into account in a correlation of mean Nusselt number relative to both Reynolds numbers. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Convective heat transfer on a rotating disk with transverse air crossflow [texte imprimé] / Benjamin Latour, Auteur ; Pascale Bouvier, Auteur ; Souad Harmand, Auteur . - 2011 . - pp. [021702/1-10]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 2 (Fevrier 2011) . - pp. [021702/1-10] Mots-clés : Rotating  fins  Air  crossflow  Forced  convection  Local  heat  transfer  Infrared  thermography Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, the local convective heat transfer from a rotating disk with a transverse air crossflow was evaluated using an infrared thermographic experimental setup. Solving the inverse conduction heat transfer problem allows the local convective heat transfer coefficient to be identified. We used the specification function method along with spatio-temporal regularization to develop a model of local convective heat transfer in order to take lateral conduction and 2D geometry into account. This model was tested using rotational Reynolds numbers (based on the cylinder diameter and the peripheral speed) between 0 and 17,200 and air crossflow Reynolds numbers between 0 and 39,600. In this paper, the distribution of the local heat transfer on the disk allows us to observe the combined effect of the rotation and air crossflow on heat exchanges. This coupling is able to be taken into account in a correlation of mean Nusselt number relative to both Reynolds numbers. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]