Computation of heat transfer enhancement in a plate‐fin heat exchanger with triangular inserts and delta wing vortex generator

Sachdeva, Gulshan; Vasudevan, Raghavan; Kasana, K. S.

doi:10.1002/fld.2113

Cited by 6 publications

(3 citation statements)

References 22 publications

(16 reference statements)

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“…Sachdeva et al, [10] investigated the performance of the integration of triangular secondary fins and DWVG with stamping on incline surfaces using secondary flow analysis in plate-fin triangular ducts with delta wing vortex generators. The "staggered grid" approach was used to solve the whole Navier-Stokes equation and the energy equation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator

Abbas

Mohammed

2023

CFDL

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A 3-dimensional incompressible laminar flow and heat-transfer in a plate-fin heat exchanger (PFHE) where investigated numerically in this article. The influence of mounting a longitudinal vortex generator (LVG) on the offset rectangular-triangular fin (ORT) in the PFHE, on thermal and hydro-dynamic fields are presented. The novelty of this study is by attaching a LVG to an offset strip fin (OSF) surface. The cases of study for the PFHE are established, by using a built-in rectangular winglet pair type RWP longitudinal vortex generator carried out and fitted on this fin to improve the convective heat transfer of the (ORT) fin while minimizing pressure loss. The upper and lower plates are exposed to constant heat flux and the working fluid is air where chosen under a laminar range of RE (600 to 1400). The laminar flow and heat-transfer are governed by continuity, momentum and energy equations. ANSYS FLUENT (2021 R1) is used to get the numerical results, based on the finite volume method. The performance of the VG is assessed for an optimum winglet attack angle (45°), as well as by modifying the geometrical size parameters, namely the height and placement (L) of the RWP LVG. The result shows that the Nusselt number reaches its optimum enhancement values by using a common flow up CFU built-in rectangular winglet pair type RWP VG with a height and entrance length of (h=1.25mm, L=0.5mm), by 22.23% as compared with base case configuration (ORT). Finally, a two more LVG are tested with the optimum conditions of the RWP, which they are a delta winglet pair (DWP) and trapezoidal winglet pair (TWP). In addition, the temperature fields for the primary and secondary flows were shown in contour and streamline diagrams

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Section: Introductionmentioning

confidence: 99%

Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator

Abbas

Mohammed

2023

CFDL

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“…Additionally, Sachdeva et al [9] conducted research to better understand the flow in plate-fin triangle channels by examining the performance of delta wing vortex generators. They also analyzed the efficiency of pumping power, This was discovered to rise with increasing (β) but decrease with increasing Re-number.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Plate-Fin Heat Exchanger Performance with Aid of (RWP) Vortex Generator

Abbas¹,

Mohammed²

2023

IJHT

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Several measures have been explored to improve the function of plate-fin heat exchangers (PFHEs), including improving heat transfer surface, heat transfer coefficient, finned surface thermal efficiency, and vortex generators. We employ computational approaches in this article to investigate the flow and heat transmission parameters of a plate-fin heat exchanger (PFHE) with a longitudinal vortex generator (LVG) installed on an offset rectangular-triangular fin (ORT), as proposed in a previous work. In order to improve convective heat transmission while reducing pressure loss, the research used a rectangle wing pair (RWP) LVG installed on the fin. Using the ANSYS FLUENT is used to get the numerical outcomes. The top and lower plates are subjected to constant heat flux, and the working fluid (air) is chosen to be laminar (600 Reynolds 1400). The energy conservation problem was solved using the finite volume and finite difference (FD) approaches. Wing angles of approach (25, 35, 45, and 55°) and RWP LVG height were changed to assess the LVG's effectiveness. When compared to the reference instance, the Nusselt number rises by 22.23% when a CFU integrated RWP LVG is used at an angle of approach and height of (45°, 1.25mm). Contour and streamline maps were used to illustrate the temperature distribution of both primary and secondary flows.

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“…Tian et al [17] performed three dimensional simulations on laminar heat transfer and fluid flow characteristics of a channel with rectangular winglet pair (RWP) and delta winglet pair (DWP). Sachdeva et al [18,19] attempted heat transfer characteristics with secondary flow analysis in plate triangular fin heat exchanger with delta and rectangular wing vortex generator.This geometrical configuration was investigated for various angles of attack of the wing i.e. 15º, 20º, 26º and 37º but Reynolds numbers not exceeding 200.…”

Section: Introductionmentioning

confidence: 99%

Effect of Flow Structure on Heat Transfer in Compact Heat Exchanger by Using Finite Thickness Winglet at Acute Angle

Sharma¹

2017

Journal of Thermal Engineering

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Longitudinal vortex generation is a well-known passive technique for thinning the thermal boundary layer and hence enhancing the heat transfer, but its performance while considering the thickness is essentially unknown. In this study, a single triangular shaped winglet type vortex generator having finite thickness is analyzed in a plate fin heat exchanger with triangular inserts as secondary fins. The vortex generators are mounted on bottom and top plates of the heat exchanger and triangular inserts forms a channel, each representing the symmetry for the gasside element of the compact heat exchanger. Heat transfer and pressure drop is computed to determine the effectiveness of the vortex generator while varying its thickness, size, and angle of attack under confined laminar flow condition. In addition the winglet is tilted from vertical at an angle known as acute angle and it was found to produce two longitudinal vortices which better did the thinning of boundary layer. It is shown that adding thickness to triangular winglet and mounting at ψ = 45°, augment heat transfer along the channel wall as high as 19.7% with a corresponding increase of 7.8% in pressure loss.

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Computation of heat transfer enhancement in a plate‐fin heat exchanger with triangular inserts and delta wing vortex generator

Cited by 6 publications

References 22 publications

Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator

Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator

Enhancement of Plate-Fin Heat Exchanger Performance with Aid of (RWP) Vortex Generator

Effect of Flow Structure on Heat Transfer in Compact Heat Exchanger by Using Finite Thickness Winglet at Acute Angle

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