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Impact du rapport de blocage sur l’amélioration de la performance en présence de générateurs de vortex à ailette delta.

Impact of blockage ratio on performance enhancement in the presence of delta winglet vortex generators.

Numéro : CD-YR2-1045

Auteurs : YANINGSIH I., WIJAYANTA A. T., MIYAZAKI T., et al.

Résumé

The impact of blockage ratio (RB) on convective heat transfer and friction behaviors in a tube equipped with the double-sided delta-winglet tape insert (DWTs) was investigated experimentally. Two blockage ratio (RB = 0.28 and 0.35) were proposed in this study. The effect of parameters was compared with the result of longitudinal strip (L-S) and plain tube under similar flow conditions. Investigations were conducted at Reynolds number (Re) 5500 - 14,500. The results revealed that for employing the DWTs and L-S, the increase in the Nusselt number (Nu) and friction factor up to 318.2% and 13.4 times of plain tube and the highest thermal performance (n) is 1.3. The results also showed that thermal performance increased with the increase of RB.

Détails

  • Titre original : Impact of blockage ratio on performance enhancement in the presence of delta winglet vortex generators.
  • Identifiant de la fiche : 30023163
  • Langues : Anglais
  • Source : International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Date d'édition : 07/08/2017

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