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Performances thermo-hydrauliques de tube à ailettes internes avec un nouveau type d'ailettes.

Thermo-hydraulic performances of internally finned tube with a new type wave fin arrays.

Auteurs : PENG H., LIU L., LING X., et al.

Type d'article : Article

Résumé

The thermo-hydraulic performances of an internally finned tube (IFT) with innovative wave fin arrays were numerically and experimentally investigated. Firstly, a variety of performance tests were carried out for a range of Reynolds number from 2000 to 20000 at the air side. Then, the Nu number and friction factor f of IFT were simulated. It was found that the numerical results were well validated with the experimental data. Hence, the effects of the wave fin geometry (wave height, wave space, wave width, wave effective length, wave angle and wave arrangement) on novel IFT thermal behaviors (such as Nu & f factors, temperature & velocity profiles and secondary flow characteristics) were analyzed using the corresponding numerical model. The results indicated that the wave angle has a significant influence on the IFT thermal performance compared with the other fin geometric parameters. The vortexes generated near the corrugation of wave fin region will intensify the secondary flow and reduce the thermal boundary layer to improve heat transfer. The present work provides a framework for designing the configurations of IFT heat exchangers with this innovative wave fin arrays.

Détails

  • Titre original : Thermo-hydraulic performances of internally finned tube with a new type wave fin arrays.
  • Identifiant de la fiche : 30017638
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 98
  • Date d'édition : 05/04/2016
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2015.12.115

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