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Endwall convective heat transfer for bluff bodies

In English

Författare

Summary, in English

The endwall heat transfer characteristics of forced flow past bluff bodies have been investigated using liquid crystal thermography (LCT). The bluff body is placed in a rectangular channel with both its ends attached to the endwalls. The Reynolds number varies from 50,000 to 100,000. In this study, a single bluff body and two bluff bodies arranged in tandem are considered. Due to the formation of horseshoe vortices, the heat transfer is enhanced appreciably for both cases. However, for the case of two bluff bodies in tandem, it is found that the presence of the second bluff body decreases the heat transfer as compared to the case of a single bluff body. In addition, the results show that the heat transfer exhibits Reynolds number similarity. For a single bluff body, the Nusselt number profiles collapse well when the data are scaled by Re-0.55; for two bluff bodies arranged in tandem, the heat transfer scaling is changed to Re-0.51, indicating that the power index of Reynolds number is flow dependent. (C) 2011 Elsevier Ltd. All rights reserved.

Publiceringsår

2012

Språk

Engelska

Sidor

167-173

Publikation/Tidskrift/Serie

International Communications in Heat and Mass Transfer

Volym

39

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Energy Engineering

Nyckelord

  • LCT
  • Bluff bodies
  • Heat transfer scaling
  • Endwall heat transfer

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0735-1933