Impingement heat transfer with pressure recovery
Loading...
Date
Authors
Erasmus, Derwalt J.
Lubkoll, Matti
Craig, K.J. (Kenneth)
Von Backstrom, Theodor W.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
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.
Description
Keywords
Computational fluid dynamics (CFD), Heat transfer device, Tadpole, Impingement heat transfer, Pressure recovery
Sustainable Development Goals
Citation
Erasmus, D.J., Lubkoll, M., Craig, K.J. et al. Impingement heat transfer with pressure recovery. Heat and Mass Transfer 58, 1857–1875 (2022). https://doi.org/10.1007/s00231-022-03186-2.