Experimental and LES study of unconfined jet impingement on a smooth flat heated plate with slots of different widths

Singh, Dushyant; Udayraj,; Singh, Ashutosh; Handique, Jishnu

doi:10.1080/08916152.2022.2096153

Cited by 7 publications

(2 citation statements)

References 61 publications

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“…The air from nozzle exit comes in contact with surrounding stagnant air which creates free shear region. The Q function combines the rotation and shear effects as follows [13],…”

Section: (C) Hence the H/s Effect Onmentioning

confidence: 99%

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Experimental and Large Eddy Simulation Study of Slot Jet Impingement Cooling from Heated Cylinder placed on Flat Plate

Ganatra,

Singh,

Mukhopadhyay

2023

Preprint

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The present study focuses on experimental investigation and numerical study using Large Eddy Simulation (LES) for an air impinging jet flow. The investigation is carried out for slot jet impingement on heated cylinder with provision of adiabatic flat plate beneath the heated cylinder. The parametric investigation is conducted for parameters such as Reynolds number (Re), jet to cylinder spacing (h/S), surface curvature (S/D) and plate length (P/D). They are varied as Re = 10,000 – 25,000; h/S = 4 – 12, S/D = 0.072 – 0.108 and P/D = 0.5 – 2. The Nusselt number distribution over cylinder is experimentally obtained and to understand the impact of parameters such as Re, h/S, S/D and P/D on it; the numerical results are extracted from LES. The Nusselt number improves with increasing Re and decreasing h/S, although their impacts are not same. The major influence of Re and h/S is noticeable from θ = 0o – 180o and θ = 0o – 90o; however impact of h/S is very negligible from θ = 90o – 180o. The Nusselt number increases with increasing S/D due to more air entrainment which produces higher Reynolds stress and turbulence kinetic energy. The increasing plate length (P/D) shifts flow separation at lower angular position (θ) thereby increasing recirculation zone and reducing attached flow region. The recirculation zone contributes to heat transfer improvement in that region. Hence longer plate length P/D = 2 is ideal selection of plate length compared to P/D = 0.5 and 1 as it better facilitates positioning of cylindrical food product with optimum heat transfer.

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“…The air from nozzle exit comes in contact with surrounding stagnant air which creates free shear region. The Q function combines the rotation and shear effects as follows [13],…”

Section: (C) Hence the H/s Effect Onmentioning

confidence: 99%

“…The presence of counter rotating vortices were identified in stagnation region. Singh et al [13] investigated the effect of varying slot width using dynamic k-equation model. The vorticity, Reynolds stresses and other turbulence parameters were presented to comprehend the heat transfer distribution.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Large Eddy Simulation Study of Slot Jet Impingement Cooling from Heated Cylinder placed on Flat Plate

Ganatra,

Singh,

Mukhopadhyay

2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Experimental study and Large Eddy Simulation of slot jet impingement cooling from heated cylinder placed on flat plate

Ganatra,

Singh,

Mukhopadhyay

2024

Heat Mass Transfer

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The present study focuses on experimental investigation and numerical study using Large Eddy Simulation (LES) for an air impinging jet flow. The investigation is carried out for slot jet impingement on heated cylinder with provision of adiabatic flat plate beneath the heated cylinder. The parametric investigation is conducted for parameters such as Reynolds number (Re), jet to cylinder spacing (h/S), surface curvature (S/D) and plate length (P/D). They are varied as Re = 10,000 -25,000; h/S = 4 -12, S/D = 0.072 -0.108 and P/D = 0.5 -2. The Nusselt number distribution over cylinder is experimentally obtained and to understand the impact of parameters such as Re, h/S, S/D and P/D on it; the numerical results are extracted from LES. The Nusselt number improves with increasing Re and decreasing h/S, although their impacts are not same. The major influence of Re and h/S is noticeable from θ = 0 o -180 o and θ = 0 o -90 o ; however impact of h/S is very negligible from θ = 90 o -180 o . The Nusselt number increases with increasing S/D due to more air entrainment which produces higher Reynolds stress and turbulence kinetic energy. The increasing plate length (P/D) shifts flow separation at lower angular position (θ) thereby increasing recirculation zone and reducing attached flow region. The recirculation zone contributes to heat transfer improvement in that region. Hence longer plate length P/D = 2 is ideal selection of plate length compared to P/D = 0.5 and 1 as it better facilitates positioning of cylindrical food product with optimum heat transfer.

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Experimental and numerical analysis of film cooling performance of a corrugated surface

Singh

et al. 2022

Experimental Heat Transfer

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Experimental and LES study of unconfined jet impingement on a smooth flat heated plate with slots of different widths

Cited by 7 publications

References 61 publications

Experimental and Large Eddy Simulation Study of Slot Jet Impingement Cooling from Heated Cylinder placed on Flat Plate

Experimental and Large Eddy Simulation Study of Slot Jet Impingement Cooling from Heated Cylinder placed on Flat Plate

Experimental study and Large Eddy Simulation of slot jet impingement cooling from heated cylinder placed on flat plate

Experimental and numerical analysis of film cooling performance of a corrugated surface

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