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Effect of flow geometry parameters on transient heat transfer for turbulent flow in a circular tube with baffle inserts.

Author(s) : TANDIROGLU A.

Type of article: Article

Summary

The effect of the flow geometry parameters on transient forced convection heat transfer for turbulent flow in a circular tube with baffle inserts has been investigated. The characteristic parameters of the tubes are pitch to tube inlet diameter ratio H/D= 1, 2 and 3, baffle orientation angle beta= 45, 90 and 180°C. Air, Prandtl number of which is 0.71, was used as working fluid, while stainless steel was considered as pipe and baffle material. During the experiments, different geometrical parameters such as the baffle spacing H and the baffle orientation angle beta were varied. Totally, nine types of baffle inserted tube were used. The general empirical equations of time averaged Nusselt number and time averaged pressure drop were derived as a function of Reynolds number corresponding to the baffle geometry parameters of pitch to diameter ratio H/D, baffle orientation angle b, ratio of smooth to baffled cross-section area S(o)/S(a) and ratio of tube length to baffle spacing L/H were derived for transient flow conditions. The proposed empirical correlations were considered to be applicable within the range of Reynolds number 3000 superior or equal to Re superior or equal to 20,000 for the case of constant heat flux. [Reprinted with permission from Elsevier. Copyright, 2005].

Details

  • Original title: Effect of flow geometry parameters on transient heat transfer for turbulent flow in a circular tube with baffle inserts.
  • Record ID : 2006-2260
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 49 - n. 9-10
  • Publication date: 2006/05

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