Publicou 6 edições por ano
ISSN Imprimir: 1940-2503
ISSN On-line: 1940-2554
Indexed in
NUMERICAL INVESTIGATION OF ROUND TURBULENT SWIRLING JET IMPINGEMENT HEAT TRANSFER FROM A HOT SURFACE
RESUMO
Numerical investigation of heat transfer from a heated plane circular surface due to round turbulent submerged swirling jet impingement is conducted in this study. A round swirling turbulent jet is impinging normally on a concentric circular hot plane surface. The axisymmetric flow domain is bounded by the hot impingement surface and the jet exit plane. The flow is characterized by the jet exit Reynolds number (Re), the jet exit swirl number (Sw) representing the swirl strength of the inlet flow, and the nondimensional distance of separation from the jet exit to the impingement plate (H). The commercial CFD code ANSYS Fluent along with the transition SST k-ω turbulence model is used for the computations. In order to select a suitable turbulence model for the computations, the performance of a few turbulence models in the computation of round impinging jet heat transfer were validated against experimental data, and the transition SST k-ω model was selected. Computations are performed for many arrangements of the above-mentioned parameters and critical analysis of the heat transfer process is performed. The results indicate negative effect on heat transfer when swirl is present. For low- to mid-range swirl strength when Sw ≤ 0.77, the average Nusselt number drops mildly as Sw is increased from 0 (nonswirling case). When Sw ≥ 1, the average Nusselt number increases mildly with increasing Sw but remains less than that for the nonswirling case. Also when Sw ≤ 0.77, the average Nusselt number increases mildly with increasing jet-to-target separation distance (2 ≤ H ≤ 10). On the other hand, when Sw ≥ 1.00, the average Nusselt number moderately drops as H increases.
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Afroz Farhana, Sharif Muhammad A.R., Numerical study of turbulent annular impinging jet flow and heat transfer from a flat surface, Applied Thermal Engineering, 138, 2018. Crossref
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Afroz Farhana, Sharif Muhammad A. R., Numerical investigation of the heat transfer due to coaxial swirling turbulent jet impingement on heated flat surfaces, 8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING, 2121, 2019. Crossref
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Afroz Farhana, Sharif Muhammad A.R., Numerical investigation of heat transfer from a plane surface due to turbulent annular swirling jet impingement, International Journal of Thermal Sciences, 151, 2020. Crossref
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Afroz Farhana, Sharif Muhammad A.R., Heat Transfer From a Heated Flat Surface Due to Swirling Coaxial Turbulent Jet Impingement, Journal of Thermal Science and Engineering Applications, 13, 2, 2021. Crossref