Partager

Document IIF

Étude thermographique [infrarouge de l'ébullition] libre nucléée à flux thermique élevé.

IR thermographic investigation of nucleate pool boiling at high heat flux.

Auteurs : PETKOVSEK J., HENG Y., ZUPANCIC M., et al.

Type d'article : Article, Article de la RIF

Résumé

Nucleate water pool boiling at high heat flux was investigated on the 25?µm titanium and stainless-steel heaters at atmospheric pressure. A high-speed IR thermographic camera was applied to measure the rapidly changing transient temperature field, which served as input data for calculating the transient local heat flux distributions by solving a 3-dimensional (3-D) inverse heat conduction problem (IHCP). A phenomenon of hot spot was observed at the irregular active bubble site characterized by a longer waiting time and a higher activation temperature compared to a regular active nucleation site. The results show that the temperature of the hot spot can significantly exceed the temperature of the heater in its surroundings and remains present on the boiling surface even after the bubble departure. The calculations have shown a strong reduction of the local heat flux at the spot, which represented a potential for the beginning of the boiling crisis.

Documents disponibles

Format PDF

Pages : 127-139

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 : IR thermographic investigation of nucleate pool boiling at high heat flux.
  • Identifiant de la fiche : 30016477
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 61
  • Date d'édition : 01/2016

Liens


Voir d'autres articles du même numéro (13)
Voir la source

Indexation