A numerical study on thermo-hydraulic characteristics of turbulent ﬂow in a circular tube fitted with conical strip inserts

Fan, Aiwu; Deng, Junjie; Guo, Jian; Liu, Wei

doi:10.1016/j.applthermaleng.2011.05.007

Cited by 115 publications

(27 citation statements)

References 35 publications

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“…Eiamsa-ard et al [11] reported that, in case of using louvered strips, the general backward flow has better performance compared to forward one. Figure 2 also shows a better thermohydraulic performance was achieved with use of bigger inclination angles together with a smaller pitch (smaller distance between wings) [11,12].…”

Section: Louvered Strip Insertmentioning

confidence: 92%

Heat Transfer Enhancement by Using Different Types of Inserts

Tabatabaeikia

Mohammed

Ghazali

et al. 2014

Advances in Mechanical Engineering

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Heat transfer enhancement has been always a significantly interesting topic in order to develop high efficient, low cost, light weight, and small heat exchangers. The energy cost and environmental issue are also encouraging researchers to achieve better performance than the existing designs. Two of the most effective ways to achieve higher heat transfer rate in heat exchangers are using different kinds of inserts and modifying the heat exchanger tubes. There are different kinds of inserts employed in the heat exchanger tubes such as helical/twisted tapes, coiled wires, ribs/fins/baffles, and winglets. This paper presents an overview about the early studies on the improvement of the performance of thermal systems by using different kinds of inserts. Louvered strip insert had better function in backward flow compared to forward one. Modifying the shape of twisted tapes led to a higher efficiency in most of the cases excpet for perforated twisted tape and notched twisted tape. Combination of various inserts and tube with artificial roughness provided promising results. In case of using various propeller types, heat transfer enhancement was dependent on higher number of blades and blade angle and lower pitch ratio.

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Section: Louvered Strip Insertmentioning

confidence: 92%

Heat Transfer Enhancement by Using Different Types of Inserts

Tabatabaeikia

Mohammed

Ghazali

et al. 2014

Advances in Mechanical Engineering

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“…Fan et al recently developed a new insert with segmental conical strips for heat transfer enhancement, and demonstrated these inserts had good thermo-hydraulic performances based on the First Law of Thermodynamics in both turbulent and laminar flow regimes [32,33]. The current work is dedicated to further investigate the laminar thermal augmentation with conical strip inserts from the viewpoint of minimal entropy generation, including comparing thermo-hydraulic performances of enhanced tubes with staggered and non-staggered strip inserts, and examining the effects of geometrical parameters of strip inserts on the irreversible losses of convective heat transfer.…”

Section: Introductionmentioning

confidence: 98%

Entropy generation analysis for laminar thermal augmentation with conical strip inserts in horizontal circular tubes

You

Fan

Liu

et al. 2015

International Journal of Thermal Sciences

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“…For reducing the increase in flow resistance while maintaining satisfactory heat transfer, researchers have developed certain new heat-transfer-enhanced tubes, such as center-cleared twisted tape [6], multiple regularly spaced twisted tapes [7], and conical strip inserts [8]. Furthermore, Mohamad and Pavel [9,10] conducted a numerical simulation for heat transfer enhancement in a fully developed tube with porous media partially filling the center.…”

Section: Introductionmentioning

confidence: 99%