Numerical investigation on heat transfer performance and flow characteristics in a roughened vortex chamber

Simple item page
dc.contributor.authorAlhajeri, Hamad M.
dc.contributor.authorAlmutairi, Abdulrahman
dc.contributor.authorAlenezi, Abdulrahman H.
dc.contributor.authorGamil, Abdelaziz A. A.
dc.date.accessioned2019-03-12T16:42:37Z
dc.date.available2019-03-12T16:42:37Z
dc.date.issued2020-02-26
dc.description.abstractIn this study, an investigation of a vortex chamber was carried out to gain a full understanding of the nature of the vortex flow and the cooling capability inside the chamber. The paper discusses the effects on flow and heat transfer rates when the inside surface of the vortex chamber was roughened by adding flow turbulators to its wall. The turbulators took the shape of a rib with a square cross-section, the dimension of which varied between 0.25 mm and 2.00 mm. The paper also presents the results of a comparative investigation of jet impingement and vortex cooling on a concave wall using different parameters, such as the total pressure loss coefficient, Nusselt number and thermal performance factor, to evaluate the cooling effectiveness and flow dynamics. Furthermore, the entropy generation in swirl flow with the roughened wall was assessed over a wide range of Reynolds numbers. In this study, an investigation of a vortex chamber was carried out to gain a full understanding of the nature of the vortex flow and the cooling capability inside the chamber. The paper discusses the effects on flow and heat transfer rates when the inside surface of the vortex chamber was roughened by adding flow turbulators to its wall. The turbulators took the shape of a rib with a square cross-section, the dimension of which varied between 0.25 mm and 2.00 mm. The paper also presents the results of a comparative investigation of jet impingement and vortex cooling on a concave wall using different parameters, such as the total pressure loss coefficient, Nusselt number and thermal performance factor, to evaluate the cooling effectiveness and flow dynamics. Furthermore, the entropy generation in swirl flow with the roughened wall was assessed over a wide range of Reynolds numbers. The results show that surface roughness considerably influences the velocity distribution, heat transfer patterns and pressure drop in the vortex chamber. The highest thermal performance factor takes place at rib heights of 0.25 mm and 0.50 mm with a low Re number. Further increase in rib height has an adverse impact on thermal performance. At a Reynolds number lower than 50,000, it is highly recommended to use roughened vortex cooling to obtain the best thermal performance.en_UK
dc.identifier.citationAlhajeri HM, Almutairi A, Alenezi AH, Gamil AA. (2019) Numerical investigation on heat transfer performance and flow characteristics in a roughened vortex chamber. Applied Thermal Engineering, Volume 153, May 2019, pp. 58-68en_UK
dc.identifier.issn1359-4311
dc.identifier.urihttps://doi.org/10.1016/j.applthermaleng.2019.02.071
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13983
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectVortex chamberen_UK
dc.subjectEntropyen_UK
dc.subjectNusselt numberen_UK
dc.subjectImpingementen_UK
dc.subjectRoughened surfaceen_UK
dc.titleNumerical investigation on heat transfer performance and flow characteristics in a roughened vortex chamberen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Numerical_investigation_on_heat_transfer_performance_and_flow_characteristics-2019.pdf
Size:
2.98 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)