Experimental and numerical study on the transient heat-transfer characteristics of circular air-jet impingement on a flat plate

Guo, Qiang; Wen, Zhi; Dou, Ruifeng

doi:10.1016/j.ijheatmasstransfer.2016.09.048

Cited by 38 publications

(23 citation statements)

References 19 publications

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“…For the numerical simulation of laminar impinging jets, the numerical procedure similar to [9] has been followed. While simulation technique presented in [10] is considered for turbulent impinging jets. Later validation of numerical procedure, for all further simulations, the properties of impinging gas and plate material are assumed same as mentioned by [9].…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…Further, to validate the numerical procedure employed for turbulent impinging jets, numerical modelling mentioned in [10] is followed. Through the comparative analysis of different turbulence models, RNG k   turbulence model was used in [10] and here same is employed, to simulate jet impingement.…”

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

“…Through the comparative analysis of different turbulence models, RNG k   turbulence model was used in [10] and here same is employed, to simulate jet impingement. Instead 3-D simulation, simple 2-D axisymmetric simulation is carried out to save computational time.…”

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

“…Instead 3-D simulation, simple 2-D axisymmetric simulation is carried out to save computational time. The comparative analysis of the current Nusselt number (Nu) distribution with simulation data published in [10] for Re=34000 at Z/d=4 and Z/d=8.5 is presented in figure (4). At stagnation point, for Z/d=4, the current simulation results predicts Nu around 3% less than the published data [10] whereas for Z/d=8.5, it matches exactly.…”

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

“…For both Z/d, Nu prediction is poor at larger r/d due to difference in mesh structure. The mesh used in 3-D simulation [10] is course at larger r/d whereas in current numerical modelling, fine boundary layer mesh continues till the end (r/d). It was necessary to maintain orthogonality in 2-D simulation.…”

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

See 4 more Smart Citations

Transient heat transfer characterization of impinging hot / cold jets by analytical IHCP

Kadam

Hindasageri

Kumar

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Unknown transient surface temperature and heat flux distribution at the impingement side (front side) is estimated from known temperature distribution at non-impingement side (back side) using analytical solution to three dimensional inverse heat conduction problem (IHCP). Back side input temperature data are obtained by running forward code in Fluent. Hot as well as cold impinging jets are characterized with the help of this solution. Laminar and turbulent jets at nozzle to plate spacing (Z/d) equal to 4 are considered. Hot gas at temperature 500 K and 3000 K is impinged on a 1 mm flat plate which considered initially at temperature 300 K in case of heating application. Whereas in cooling application, flat plate is initially assumed at temperature 673 K and isothermal air jet at 293 K is impinged on it. The temperature and heat flux estimation data by present technique is in very good agreement with the simulation data.

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Section: Numerical Proceduresmentioning

confidence: 99%

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

Section: Validation Of Simulation Proceduresmentioning

confidence: 99%

See 3 more Smart Citations

Transient heat transfer characterization of impinging hot / cold jets by analytical IHCP

Kadam

Hindasageri

Kumar

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Flow and heat transfer studies of multijet impingement cooling for different configurations: A review

Gudla

Pujari

2022

Heat Trans

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Increasing the gas turbine engine's turbine intake temperature has long been a potential strategy for increasing the specific work output of the engine. However, the melting temperature of the turbine blades and vane material limits the maximum intake temperature. As a result, internal and external cooling techniques are commonly used to maintain the vane material in a safe condition. This study provided an overview of internal impingement cooling to highlight the significance of geometrical variations, such as flat plate, curve plate, and actual vanes. It was observed that flat and curved plate impingement heat transfer studies were reported extensively, whereas limited studies were found on the conjugate effects on airfoil surfaces. The importance of conjugate heat transfer studies and their impact has recently been described in the literature. In most of the literature, a wide range of instruments, such as Laser Doppler Velocimeter, Particle Image Velocimeter, liquid crystal sheets, and so forth, were used for experimental investigations. According to most studies, the local value of internal surface temperature and heat transfer coefficient are vital factors of local flow behavior. Jet‐to‐jet spacing, jet‐to‐plate spacing, jet hole diameter, and jet Reynolds numbers played a crucial role in both numerical and experimental analyses. Different geometric variations strongly influence flow behavior. Therefore, the usual method for determining interior temperature distributions and heat transfer coefficients by considering generalized geometries like the flat and curved plate may not produce accurate conjugate solutions. Most of the computational studies on the flat and curved plate indicate the usage of κ−ω shear stress transport and κ–ε realizable model to predict the heat transfer coefficient.

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Performance investigation of a solar thermal collector provided with air jets impingement on multi V-shaped protrusion ribs absorber plate

et al. 2019

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Experimental and numerical study on the transient heat-transfer characteristics of circular air-jet impingement on a flat plate

Cited by 38 publications

References 19 publications

Transient heat transfer characterization of impinging hot / cold jets by analytical IHCP

Transient heat transfer characterization of impinging hot / cold jets by analytical IHCP

Flow and heat transfer studies of multijet impingement cooling for different configurations: A review

Performance investigation of a solar thermal collector provided with air jets impingement on multi V-shaped protrusion ribs absorber plate

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