Flow topology, heat transfer characteristic and thermal performance in a circular tube heat exchanger inserted with punched delta winglet vortex generators

Boonloi, Amnart; Jedsadaratanachai, Withada

doi:10.1007/s12206-015-1251-2

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…A new design of DWT by Skullong [5] on air flow had obtained an overall optimization of 1.48 for an inclination angle of the wing of 30 0 and pitch ratio 1. Withada's [6] punched DWVG proved better heat transfer rate for the laminar flow with an optimization factor of 2.8 for Re 2000 and angle of attack 25 0 . Staggered-winglet by Skullong [7] proved to be one of the augmentation technique which has its maximum enhancement factor of 1.71 at Re 4180, baffle ratio 0.15 and pitch ratio 1.…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Thermo-Hydraulic Performance Index of a Double Pipe Heat Exchanger Using Double Sided Louvered Winglet Tape

Thejaraju

Girisha²,

Manjunath³

et al. 2020

Journal of Thermal Engineering

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The decade has witnessed great importance of numerical techniques for scientists and researchers in deciding the correctness, stability, and reliability of new designs. In the present study a numerical technique has been implemented to investigate the thermo-hydraulic performance of the Louvered winglet tape inside the tube section of the double pipe heat exchanger. The Louvered winglet tape has been examined with the slope angle of 50, 100, 150 and 210 to study their thermal characteristics. The Reynolds number 4000-30000 was examined on slope angle of 50, 100, 150 and 210 to study their flow characteristics in the turbulent domain. A smooth pipe was examined to evaluate heat transfer characteristics in terms of Nusselt number and friction coefficient over augmented tube with Louvered winglet tape. The results show a satisfactory performance of Louvered winglet tape over the smooth tube with a similar trend of friction factor, Nusselt number, and thermo-hydraulic performance index (THPI). The percentage of increment of the Nusselt number of the results is found to be 237.04%, 258.4%, 275.11%, and 289.72% when compared to smooth pipe with respect to slope angle of 50, 100, 150 and 210, respectively. The amount of increase in the friction factor in comparison with plain tube is 5.13, 6.73, 8.33, and 11.73 times of that of smooth pipe with respect to slope angle of 50, 100, 150 and 210, respectively. The Louvered winglet tape with slope angle 150 has shown to be promising with respect to higher THPI when considering with other slope angle of 50, 100, and 210. The maximum THPI of 1.85 was obtained for slope angle 150 at Re 12000. Similarly, the THPI values for other slope angle 50, 100, and 210 are 1.71, 1.78 and 1.69. In addition to better performance the Louvered winglet tape can be easily fabricated and adapted for a wide variety of heat transfer industries.

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Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Thermo-Hydraulic Performance Index of a Double Pipe Heat Exchanger Using Double Sided Louvered Winglet Tape

Thejaraju

Girisha²,

Manjunath³

et al. 2020

Journal of Thermal Engineering

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“…This research is intended to know the effect of an additional gothic vortex generator on the upper wing surface of NACA 2412. Research on vortex generators has been carried out by many experts including López Calle [1], Boonloi et al [2], Velte et al [3], Shim et al [4] etc. However, this topic is interesting to dig deeper so that almost every year there are always new developments regarding vortex generators.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Gothic Vortex Generator Using Computational Fluid Dynamic on Naca 2412

Nuranto¹,

Putro²,

Pambudiyatno³

2023

Proceedings of the International Conference on Advance Transportation, Engineering, and Applied Science (ICATEAS 2022)

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A vortex generator is a small component that has shaped as a fin and located on upper the surface of the wing or stabilizer to do modification the airflow around the wing surface that affects the boundary layer. In this research, analysis of the aerodynamic characteristic has been done by using computational fluid dynamics (CFD). The purpose of this analysis is to find out the difference in the airflow between NACA 2412 with an additional gothic vortex generator and NACA 2412 without an additional vortex generator, and also to find out the airflow characteristic on NACA 2412 with varying angle of attack. The Research method used is analysis simulation on test object airfoil NACA 2412 with an additional gothic vortex generator with straight configuration with the angle of attack variation 0°,

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“…This study aims to determine the effect of adding a rectangular vortex generator to the upper wing surface of NACA 0012. Simulation using CFD on a vortex generator has been carried out by Oriol [1], Amnart [2], Velte et al [3], Shim [4], Syaiful [5] etc.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Rectangular Vortex Generator in Sweptback Wing Airfoil NACA 0012 with Counter-Rotating Position

Putra¹,

Putro²,

Pambudiyatno³

2023

Proceedings of the International Conference on Advance Transportation, Engineering, and Applied Science (ICATEAS 2022)

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Airplanes can fly because of the slightly curved shape of the plane's wings called the airfoil. Airfoil is still used by aircraft today but continues to be designed to get maximum results. The research method used is a simulation analysis method on the NACA 0012 test object with ANSYS-CFD software which is given a variation in the shape of a rectangle vortex generator with a length of 15 mm, a width of 10 mm, and a distance between vortex generators of 10 cm. The angles of attack reviewed are 0°,

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Flow topology, heat transfer characteristic and thermal performance in a circular tube heat exchanger inserted with punched delta winglet vortex generators

Cited by 12 publications

References 20 publications

Numerical Evaluation of Thermo-Hydraulic Performance Index of a Double Pipe Heat Exchanger Using Double Sided Louvered Winglet Tape

Numerical Evaluation of Thermo-Hydraulic Performance Index of a Double Pipe Heat Exchanger Using Double Sided Louvered Winglet Tape

Analysis of the Effect of Gothic Vortex Generator Using Computational Fluid Dynamic on Naca 2412

Numerical Simulation of Rectangular Vortex Generator in Sweptback Wing Airfoil NACA 0012 with Counter-Rotating Position

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