Heat transfer and flow velocity study of a row of jets emerging from a perforated pipe at a low Reynolds number

Ahmimache, Yassine; Fénot, Matthieu; Plourde, Frédéric; Descamps, Laurent

doi:10.1016/j.ijheatmasstransfer.2021.122067

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Heat transfer from an impinging jet can highly be localized, hence often necessitating multiple arrays of jets. Impinging jets can be found in diverse applications such as turbine blade cooling, turbine adaptive clearance control systems 2 , aircraft wing anti-icing configurations, and aircraft engine thrust reversers.…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of a thermal impinging jet using the lattice Boltzmann method

et al. 2022

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A compressible Hybrid Lattice Boltzmann Method solver is used to perform a wall-resolved Large eddy simulation of an isothermal axisymmetric jet issuing from a pipe and impinging on a heated flat plate at a Reynolds number of 23 000, a Mach number of 0.1, and an impingement distance of two jet diameters. The jet flow field statistics, Nusselt number profile (including the secondary peak), and shear stress profile were well reproduced. The azimuthal coherence of the primary vortical structures was relatively low, leading to no discernible temporal periodicity of the azimuthally averaged Nusselt number at the location of the secondary peak. While local unsteady near-wall flow separation was observed in the wall jet, this flow separation did not exhibit azimuthal coherence and was not found to be the only cause of the thermal spots blue, which lead to the secondary peak in the Nusselt number, as stream-wise oriented structures also played a significant role in increasing the local heat transfer.

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Section: Introductionmentioning

confidence: 99%

Large eddy simulation of a thermal impinging jet using the lattice Boltzmann method

et al. 2022

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“…Ahmimache and Fénot [24] also observed that velocity measurement and flow structure characterization on impinging jets have yet to be accomplished. Therefore, they did the aerodynamic and thermal experiments on a single line of seven jets that came out of a pipe and hit a plate at a low Reynolds number.…”

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confidence: 99%

Relation between Velocity and Pressure in Circular and Non-Circular Shape Duct for Local Exhaust Ventilation (LEV) System

Sies,

M. Sharif,

Ismon

et al. 2022

JAMEA

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Local exhaust ventilation (LEV) is used to isolate contaminants from the source. It is vital to ensure good air quality, particularly for employees exposed to hazardous gases such as high-temperature factories and kitchens where food is cooked. This simulation explores how a particular cross-sectional duct structure influences the ventilation device’s velocity distribution and pressure decrease. The system’s design consists of a collecting hood, 90° bends, 45° bends, and a straight pipe. Three models use the same volume around the unit. There are circular (Model A), square (Model B), and rectangular (Model C). This study is carried out using Computational Fluid Dynamic (CFD). The simulation shows the behaviour of the airflow from the inlet to the exit in all three models. Model A is the most preferable of the results produced because the velocity distribution in this circular line is evener and more balanced. The average velocity of the model A device is a mean of 2.80m/s, and the lowest mild pressure is -76.74 Pa. Changesin the path of the system’s flow creates eddy and disturbance to the system’s flow. Higher pressure to sustain the optimal flow speed will increase energy consumption and help more robust preliminary designs for local exhaust ventilation.

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Enhancing heat transfer characteristics and optimization of a multi-jet cooling system

Cai,

Wang,

Luo

et al. 2024

Applied Thermal Engineering

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Heat transfer and flow velocity study of a row of jets emerging from a perforated pipe at a low Reynolds number

Cited by 7 publications

References 44 publications

Large eddy simulation of a thermal impinging jet using the lattice Boltzmann method

Large eddy simulation of a thermal impinging jet using the lattice Boltzmann method

Relation between Velocity and Pressure in Circular and Non-Circular Shape Duct for Local Exhaust Ventilation (LEV) System

Enhancing heat transfer characteristics and optimization of a multi-jet cooling system

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