Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators

Kongkaitpaiboon, Vichan; Nanan, K.; Eiamsa-ard, Smith

doi:10.1016/j.icheatmasstransfer.2009.12.016

Cited by 120 publications

(52 citation statements)

References 16 publications

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“…The influence of the flow geometry parameters on transient forced convection heat transfer for turbulent flow in a tube with baffle inserts was reported by Tandiroglu [17]. Kongkaitpaiboon et al [18] presented the effect of the circular-ring turbulator on the heat transfer and fluid friction characteristics in a heat exchanger…”

Section: Accepted Manuscriptmentioning

confidence: 85%

Heat transfer augmentation in a circular tube with winglet vortex generators

Chokphoemphun

Pimsarn

Thianpong

et al. 2015

Chinese Journal of Chemical Engineering

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Section: Accepted Manuscriptmentioning

confidence: 85%

Heat transfer augmentation in a circular tube with winglet vortex generators

Chokphoemphun

Pimsarn

Thianpong

et al. 2015

Chinese Journal of Chemical Engineering

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“…They summarized that the enhancement of the heat transfer rate is around 57-195% higher than the baseline case. The heat transfer augmentations in the heat exchanger with conical-ring were presented Durmus, 2004;Eiamsa-ard and Promvonge, 2006a;2006b;Promvonge and Eiamsa-ard, 2007a;2007b;2007c;2007d;Kongkaitpaiboon et al, 2010a;Ozceyhan et al, 2008;Akansu, 2006;Kiml et al, 2003;2004;Kongkaitpaiboon et al, 2010b). The researchers concluded that the flow area has high effect for the increment of the pressure loss in the heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Jedsadaratanachai¹,

Boonloi²

2016

Journal of Mathematics and Statistics

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Flow and heat transfer profiles in a square channel heat exchanger inserted with 45° V-orifices are presented. The influences of Reynolds number (Re = 3000-10,000) and blockage ratio (BR = 0.05, 0.10, 0.15, 0.20 and 0.25) on periodic concepts are investigated numerically. The computational domain is solved with the finite volume method and SIMPLE algorithm. As the numerical results, the periodic profiles on flow and heat transfer are found when inserted the 45° Vorifices in the square duct. The configurations on flow and heat transfer in the heating section can separated into two sections; periodic profile and fully developed periodic profile. The patterns on flow and heat transfer are similar, but the values are not equal, called "periodic profiles", while the identical on both profiles and values, called "fully developed periodic profiles". In addition, the periodic structures depends on the parameters of the vortex generator, position in the channel and Reynolds number.

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“…Kongkaitpaiboon et al (2010a) experimentally studied on heat transfer and friction loss in a circular tube heat exchanger with circular-ring vortex generators. The effects of the diameter ratios (diameter of the orifice to the diameter of the tube) and pitch ratios (P/D) were investigated for turbulent region, Re = 4000-20,000.…”

Section: Introductionmentioning

confidence: 99%

Convective Heat Transfer and Thermal Performance in a Circular Tube Heat Exchanger Inserted with U-Shaped Baffle

Boonloi¹,

Jedsadaratanachai²

2017

Journal of Mathematics and Statistics

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Numerical investigations on flow structure and heat transfer characteristic in a heat exchanger tube fitted with U-shaped baffle are presented. The U-shaped baffle is created from the concepts of orifice and inclined baffle. The influences of the baffle height (b/D = 0.05, 0.10, 0.15, 0.20 and 0.25) and flow attack angle (α = 20°, 30° and 45°) of the Ushaped baffle on heat transfer, pressure loss and thermal performance are considered. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The numerical results are reported in terms of flow visualization and heat transfer behavior. The performance analysis for the tube heat exchanger inserted with the U-shaped baffle is also reported. As the numerical result, it is found that the insertion of the U-shaped baffle help to improve the heat transfer rate and thermal performance higher than the smooth tube with no baffle. The increments of heat transfer rate and pressure loss are around 1-8.7 and 1-29 times over the smooth tube, respectively. Additionally, it is detected that the 45° U-shaped baffle with the BR = 0.2 gives the highest thermal enhancement factor around 2.9 at the highest Reynolds number, Re = 1200.

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Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators

Cited by 120 publications

References 16 publications

Heat transfer augmentation in a circular tube with winglet vortex generators

Heat transfer augmentation in a circular tube with winglet vortex generators

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Convective Heat Transfer and Thermal Performance in a Circular Tube Heat Exchanger Inserted with U-Shaped Baffle

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