Variable wall thickness scroll geometry modeling with use of a control volume approach / Bryce R. Shaffer in International journal of refrigeration, Vol. 36 N° 7 (Novembre 2013)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - pp. 1809–1820 Titre : Variable wall thickness scroll geometry modeling with use of a control volume approach Titre original : Modélisation par géométrie de défilement de l'épaisseur variable des parois grâce à l'utilisation d'une approche par régulation du volume Type de document : texte imprimé Auteurs : Bryce R. Shaffer, Auteur ; Eckhard A. Groll, Auteur Année de publication : 2014 Article en page(s) : pp. 1809–1820 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Scroll compressor  expander  Geometry  Variable wall thickness Résumé : In a scroll-type compressor, compression is achieved through relative contact between two spiral curves. Since the scroll invention by Leon Creux (1905), multiple methods have been developed for calculating scroll geometry. What can generally be considered the most classical method, is defining each scroll curve as the involute of a circle. Gravesen and Henriksen (2001) introduced a new method to calculate scroll geometry by deriving each scroll curve from the radius of curvature parameterized with involute angle. This allows a wide range of involute geometries to be considered not included in the classical method. In this paper, Gravesen's method is extended to the tip region to include all tip geometries involved in a two arc configuration resulting in a more comprehensive scroll geometry definition. Lastly, with parametric representation of all scroll geometry, the pocket volume can be easily solved using a derived control volume approach. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002077 [article] Variable wall thickness scroll geometry modeling with use of a control volume approach = Modélisation par géométrie de défilement de l'épaisseur variable des parois grâce à l'utilisation d'une approche par régulation du volume [texte imprimé] / Bryce R. Shaffer, Auteur ; Eckhard A. Groll, Auteur . - 2014 . - pp. 1809–1820. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - pp. 1809–1820 Mots-clés : Scroll compressor  expander  Geometry  Variable wall thickness Résumé : In a scroll-type compressor, compression is achieved through relative contact between two spiral curves. Since the scroll invention by Leon Creux (1905), multiple methods have been developed for calculating scroll geometry. What can generally be considered the most classical method, is defining each scroll curve as the involute of a circle. Gravesen and Henriksen (2001) introduced a new method to calculate scroll geometry by deriving each scroll curve from the radius of curvature parameterized with involute angle. This allows a wide range of involute geometries to be considered not included in the classical method. In this paper, Gravesen's method is extended to the tip region to include all tip geometries involved in a two arc configuration resulting in a more comprehensive scroll geometry definition. Lastly, with parametric representation of all scroll geometry, the pocket volume can be easily solved using a derived control volume approach. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002077

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