Heat transfer augmentation in a wedge-ribbed channel using winglet vortex generators

Chompookham, Teerapat; Thianpong, Chinaruk; Kwankaomeng, Sutapat; Promvonge, Pongjet

doi:10.1016/j.icheatmasstransfer.2009.09.012

Cited by 128 publications

(30 citation statements)

References 25 publications

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“…The values of Reynolds number, Nusselt number, average Nusselt number, friction factor and thermal-hydraulic performance have been calculated using the following equations [15,17,[19][20][21][22][23]:…”

Section: Data Reductionmentioning

confidence: 99%

“…Bekele et al [14] conducted indoor experiments to examine the effect of a delta-pattern blockage mounted on the heated wall of a rectangular passage with a small aspect ratio of 5.0:1.0. Chompookham et al [15] conducted an experimental study on the effective efficiency performance of the winglet vortex type generators in a turbulent flow. Abene et al [16] experimentally investigated the heat transfer augmentation of several different patterns of blockages attached to the top wall of a rectangular passage.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles

Kumar

Kim

2016

Energies

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This article presents heat transfer and fluid flow characteristics in a solar air heater (SAH) channel with multi V-type perforated baffles. The flow passage has an aspect ratio of 10. The relative baffle height, relative pitch, relative baffle hole position, flow attack angle, and baffle open area ratio are 0.6, 8.0, 0.42, 60˝, and 12%, respectively. The Reynolds numbers considered in the study was in the range of 3000-10,000. The re-normalization group (RNG) k-ε turbulence model has been used for numerical analysis, and the optimum relative baffle width has been investigated considering relative baffle widths of 1.0-7.0.The numerical results are in good agreement with the experimental data for the range considered in the study. Multi V-type perforated baffles are shown to have better thermal performance as compared to other baffle shapes in a rectangular passage. The overall thermal hydraulic performance shows the maximum value at the relative baffle width of 5.0.

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Section: Data Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles

Kumar

Kim

2016

Energies

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“…They collected the data using different values for the mass flow rate of the fluid and different levels for the heated plates in an air duct. Chompookham et al [116] reported the experimental prediction of the effect of the combination of a wedge turbulator and winglet-type vortex generators on the Nu and f behaviors for a turbulent airflow. Abene et al [117] experimentally investigated the heat transfer augmentation of several types of obstacles fitted on the upper face of an air channel.…”

Section: Baffles Used As Roughness Turbulence Promoters In Solar Air mentioning

confidence: 99%

Convective heat transfer enhancement in solar air channels

Kumar

Kim

2015

Applied Thermal Engineering

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“…Promovong [16] experimentally investigated the turbulent forced convection Nurs and frs loss behavior in a high Wd/Hd channel attached with 60° V-shaped baffels. Akpinar et al [17] experimentally investigate the performance analysis of four types of SAH with different obstacles and without obstacle. They reported that efficiency of SAH depends on the surface geometry of collectors, solar radiation of air stream line.…”

Section: IImentioning

confidence: 99%

Performance Evaluation on Double Pass Solar Air Heater with Broken Multiple V-Type Baffles- A Review

Kumar¹

2018

IJRASET

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Thermal performance of double pass solar air heater has been found to be improved by the use of artificial roughness provided on the both side of the absorber plate. The roughness provided on the absorber plate for increasing the heat transfer is also used to increase the pressure drop due increased friction. The heat transfer enhancement of absorber plate has been experimentally determined by using v-shaped baffle with multiple gaps. An experimental study will be carried out to analyze the effect of v-shape with gap baffles used as roughness geometry on heat transfer along its friction factor. The heat transfer and friction factor data obtained from the experiment is compared with the data obtained from smooth duct under the same condition. Correlation will also develop for Nusselt number (Nu) and friction factor (f) as a function of roughness and flow parameter. The maximum enhancement in the Nusselt number and friction factor is observed.

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Heat transfer augmentation in a wedge-ribbed channel using winglet vortex generators

Cited by 128 publications

References 25 publications

Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles

Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles

Convective heat transfer enhancement in solar air channels

Performance Evaluation on Double Pass Solar Air Heater with Broken Multiple V-Type Baffles- A Review

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