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Thermodynamic study on the influence of mixing state on ejector performance.

Auteurs : XI X., JIANG L., ZHANG L., LIU J., HAO X., ZHAO X., GAO N.

Type d'article : Article de la RIF

Résumé

The energy conversion and loss in mixing process directly affects the ejector performance. In this paper, the mixing state before the final shock is characterized by the speed ratio and the mixing layer thickness-related parameter. The influence of mixing state on performance is analyzed through thermodynamic calculations.
Thorough mixing raises mixing and final shock entropy production. Maintaining a larger mixing flow velocity difference can effectively reduce entropy production caused by final shock. In critical mode, with a fixed entrainment ratio, the total pressure loss associated with decreasing back pressure is jointly attributed to
excessive mixing and the final shock. After mixing enhancement, more entrained flow gains driving force, and the increase in the entrainment ratio indicates that the mixing flow adjusts to a new choked condition. The ejector achieves optimal performance when the Mach number on the low-velocity side of the mixing flow reaches
1 (Mamin = 1). The relationship between mixing states and performance indicates that non-structural mixing enhancement methods could, to a certain extent, support the performance regulation of geometrically adjustable ejectors, thereby improving their adaptability to diverse application scenarios. Meanwhile, this provides a novel
pathway for the performance optimization of fixed-structure ejectors.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Thermodynamic study on the influence of mixing state on ejector performance.
  • Identifiant de la fiche : 30035293
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 189
  • Date d'édition : 09/2026
  • DOI : http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2026.107018

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