Flow and heat transfer characteristics over rectangular blocked surfaces

Umur H., Yemenici O., Umur Y., Sakin A.

EXPERIMENTAL HEAT TRANSFER, cilt.30, sa.3, ss.192-204, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 3
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1080/08916152.2016.1233146
  • Dergi Adı: EXPERIMENTAL HEAT TRANSFER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.192-204
  • Anahtar Kelimeler: blocked surface, turbulent intensity, heat transfer, flow separation, TURBULENT-FLOW, 3-DIMENSIONAL BLOCKS, 2-DIMENSIONAL RIBS, CONVECTIVE FLOW, PARALLEL PLATES, CHANNEL, ENHANCEMENT, OBSTACLES
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Heat transfer and flow measurements were recorded over blocked surfaces to investigate the effects of flow velocity and block shape on flow separation and heat transfer. The results indicated that the flow separation occurred particularly on the first block and after the last blocks. The flow separation and block thickness resulted in higher turbulence and heat transfer, particularly in laminar flow. The average Stanton number increased as high as 125% in laminar, 80% in transitional, and 50% in turbulent flows above those of flat plate values. A new empirical equation indicated a good agreement with the experimental and numerical results.