Flow Characteristic of Staggered Multiple Slotted Tubes in the Passage of a Fin Tube Heat Exchanger

Yayla S.

STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING, vol.59, pp.462-472, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 59
  • Publication Date: 2013
  • Doi Number: 10.5545/sv-jme.2012.902
  • Journal Name: STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.462-472
  • Keywords: particle image velocimetry (PIV), tube heat exchanger, turbulent flow, staggered slotted cylinders, PLATE-FIN, CYLINDER, VORTEX
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

The flow characteristics of inline and staggered cylinders placed in a fin tube heat exchanger model are experimentally investigated for Reynolds numbers of 1500 and 4000, having a duct height to cylinder diameter ratio of 0.4. In this study, the Reynolds number is calculated based on the cylinder diameter. Particle image velocimetry (PIV) is studied to obtain instantaneous representations of the non-steady flow for a specified flow field. Time-averaged flow data clearly indicates that flow through semi-cylinders has a substantial effect on the turbulent flow characteristics. A variation of time-averaged flow data along a specific line is also presented graphically. The flow interactions in the stream-wise and cross-stream bases of the staggered cylinders with a flat plate surface result in a three-dimensional and a complex flow behaviour.