Experimental and numerical analysis of cylindrical turbulators in a double pipe heat exchanger under turbulent flow conditions

Shiva Kumar, P. Dinesha, K. R.N. Sai Krishna

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Abstract

In the present work, the use of cylindrical turbulators in a double pipe heat exchanger has been investigated. Cylindrical fin type of turbulators has been placed circumferentially separated by 90° on the outer side of an inner pipe at a regular pitch. Experimental studies were undertaken for different air flow rates in a turbulent regime whose Reynolds number range between 2500 and 10000. Heat transfer characteristics like Nu and friction factor have been experimentally determined. Parametric studies were conducted by changing the pitch and also the orientation of the turbulators. Nu and friction factor were found to increase as the pitch is reduced. A model with alternatively changed orientation outperformed others by exhibiting highest Nu and reduced friction factor.

Original languageEnglish
Pages (from-to)245-262
Number of pages18
JournalJournal of Turbulence
Volume20
Issue number4
DOIs
Publication statusPublished - 03-04-2019

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All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physics and Astronomy(all)

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