Thermal Performance Enhancement for Heat Exchanger Tube Fitted with Vortex Generator Inserts

Abdelmaksoud, Waleed A.; Mahfouz, Alaa E.; Khalil, Essam E.

doi:10.1080/01457632.2020.1826743

Cited by 13 publications

(1 citation statement)

References 43 publications

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“…Improving the performance of heat exchangers in manufacturing and industry is very much needed to save energy [1][2][3]. In recent years, the industry has grown quite rapidly, such as in the food and beverages, pharmaceutical, and technical segments as in the current era.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Thermal-Hydraulic Performance on Circular Channel Using Vortex Generator

Arya¹,

Syaiful²,

Muchammad³

2022

IRJIET

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Vortex generators are often used in the industrial world because they can improve heat transfer well. Vortex generators make it possible to mix hot and cold fluids to be more optimal than not using them. Therefore, the current study aims to investigate the thermal-hydraulic of each case of a delta-winglet type vortex generator in a circular channel using numerical simulations. This modelling is carried out by varying the angle of the vortex generator type delta-winglet, namely, 90°, 105°, and 120°, which are arranged in a line, and the angle of attack in all cases is 30°. The Reynolds number is set from 4,000 to 12,000 with an interval of 2,000 and using the k-ω turbulent SST model. The working fluid used in this study is water. This fluid was chosen because it has better thermal conductivity than air, even though it has a higher viscosity and results in increased flow resistance. This study found that the highest heat transfer was a deltawinglet vortex generator at 90°, 105°, and 120°. But the delta-winglet, which has the highest heat transfer, will impact the increased flow resistance. Furthermore, the best thermal-hydraulic results were achieved in the case of the delta-winglet vortex generator at an angle of 120° of 2.47.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Thermal-Hydraulic Performance on Circular Channel Using Vortex Generator

Arya¹,

Syaiful²,

Muchammad³

2022

IRJIET

View full text Add to dashboard Cite

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A critical review of the thermo-hydraulic performance of vortex generators using the field synergy and exergy principles

Raaj Khishorre,

Rahul,

Harshavardhanan

et al. 2023

J Therm Anal Calorim

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Numerical investigation of thermo-hydraulic performance in an annular heat exchanger with sinusoidal vortex generators

Wang,

Oon,

Foo

et al. 2023

J Therm Anal Calorim

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This study investigates thermal performance enhancement by utilizing vortex generators (VGs). VGs come in many designs, and this paper proposes optimizations for the sinusoidal vortex generator (SVG) when used in an annular conduit to improve heat transfer with minimal pressure drop. Two vital parameters of the SVG are analyzed, namely, blockage ratios (BRs) (0.1 and 0.2) and attack angles (α) (0–90°). The investigated fluid regime is turbulent, with the Reynolds number (Re) ranging from 5973 to 11,947. Three rows of SVGs are fitted on the surface of the inner pipe, where constant heat flux is applied, while the outer pipe wall is entirely insulated. The results indicate that the highest Nusselt number is enhanced by 20.4% over the smooth pipe when the case with BR = 0.2 and α = 90° is used at Re = 5973. However, the friction factor increases by 56.5% for the same case. Two types of transverse vortices are identified, where one type has its rotational axis normal to the inner pipe surface, and the other has its rotational axis parallel to the inner pipe surface. Those vortices with the axis perpendicular to the pipe surface merge with the fluid above the SVG to develop longitudinal vortices in different BRs and α. The case with BR = 0.2 and α = 15° yields the greatest average performance evaluation criterion (PEC) compared to other tested cases with a value of 1.054. This study finds that SVGs can contribute to a more efficient annular pipe-based heat transfer system.

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Thermal Performance Enhancement for Heat Exchanger Tube Fitted with Vortex Generator Inserts

Cited by 13 publications

References 43 publications

Numerical Analysis of the Thermal-Hydraulic Performance on Circular Channel Using Vortex Generator

Numerical Analysis of the Thermal-Hydraulic Performance on Circular Channel Using Vortex Generator

A critical review of the thermo-hydraulic performance of vortex generators using the field synergy and exergy principles

Numerical investigation of thermo-hydraulic performance in an annular heat exchanger with sinusoidal vortex generators

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