Central receiver heat transfer enhancement using jet impingement with passive velocity excitation

Craig, K.J.

doi:10.1063/1.5117529

Cited by 1 publication

(2 citation statements)

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“…Craig et al [38] investigated a similar domain using an axisymmetric RANS CFD model with the Four-Equation Transition SST turbulence model and a 3D Large Eddy Simulation (LES) CFD model. The LES model as well as the axisymmetric RANS model were validated by the experimental results from Lee et al [36].…”

Section: Turbulence Modellingmentioning

confidence: 99%

“…The impingement region of an impinging jet typically contains a stagnation region and a subsequent laminar to turbulent transition [38]. Intermittency is a turbulence metric used to quantify the fraction of time that a flow at a localized region is turbulent (as opposed to laminar) and it is used to describe flow that is transitional [40].…”

Section: Turbulence Modellingmentioning

confidence: 99%

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Impingement heat transfer with pressure recovery

et al. 2022

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A conventional impinging jet is effective at transferring a large heat flux. However a significant pressure loss is also experienced by the free jet of a jet impingement heat transfer device due to rapid expansion because it does not incorporate effective pressure recovery. A novel high-flux impingement heat transfer device, called the Tadpole, is developed to improve the heat transfer and pressure loss (performance) characteristics of the conventional impingement domain by incorporating pressure recovery with a diffuser. The Tadpole is scrutinized through an experimental comparison with a conventional jet impinging on the inner wall of a hemisphere under the turbulent flow regime. The Tadpole demonstrates promising capability by exceeding the performance characteristics of the impinging jet by up to 7.3% for the heat transfer coefficient while reducing the pressure loss by 13%. Multiple dimensional degrees of freedom in the Tadpole's flow domain can be manipulated for an enhanced heat transfer coefficient, a reduced total pressure loss or a favourable combination of both metrics. A Computational Fluid Dynamics (CFD) model is developed, the Four-Equation Transition SST turbulence model demonstrates satisfactory experimental validation with a deviation of < 5% for the heat transfer coefficient and < 23% for the total pressure loss. The Tadpole is a promising heat transfer device for high-flux applications and is recommended for further work incorporating design improvements and multidimensional optimization.

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Section: Turbulence Modellingmentioning

confidence: 99%

Section: Turbulence Modellingmentioning

confidence: 99%