Abstract
Vortex generators can be used to improve convective heat transfer by positioning them in the flow path. They causes three-dimensional longitudinal vortices to form, which facilitate bulk mixing in otherwise streamlined flows. This study uses toe-out type vortex generators to improve heat exchange in finned tube arrays, mostly by changing the base flow. The relative position of the vortex generators around the tubes has a big impact on the amount of thermal augmentation. As a result, a study is conducted to assess the impact of their cross-stream translation on flow changes and as a result, increased heat transfer. Three potential streamwise positions for installing the generators are explored for an incisive assessment, and the position in the transverse direction is varied. The velocity vectors show that the vortex generators, which promote bulk mixing over a wide fin surface, are responsible for the secondary flow structures. Apart from fins, the tubes too experience favorable changes. Higher heat transfer coefficients despite same Reynolds number, which make the heat exchanger compact, are a direct result of such flow alterations, thereby lowering the heat exchange module's unit cost.
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Arora, A., Subbarao, P.M.V. (2023). Three-Dimensional Computational Investigations of Wake Management in Finned Tube Arrays. In: Li, X., Rashidi, M.M., Lather, R.S., Raman, R. (eds) Emerging Trends in Mechanical and Industrial Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-6945-4_17
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DOI: https://doi.org/10.1007/978-981-19-6945-4_17
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