Multi objective optimization of vortex generators for heat transfer enhancement using large design space exploration
| Autor: | H. Karkaba, Thierry Lemenand, Talib Dbouk, S. Russeil, D. Bougeard, Charbel Habchi |
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| Přispěvatelé: | Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT), Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), Université d'Angers (UA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
[PHYS]Physics [physics] Convective heat transfer Angle of attack 020209 energy Process Chemistry and Technology General Chemical Engineering Heat transfer enhancement Energy Engineering and Power Technology Laminar flow 02 engineering and technology General Chemistry Mechanics Vortex generator 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering [SPI]Engineering Sciences [physics] Heat transfer 0202 electrical engineering electronic engineering information engineering Shape optimization 0210 nano-technology Shape factor ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Chemical Engineering and Processing-Process Intensification Chemical Engineering and Processing-Process Intensification, 2020, 154, pp.107982. ⟨10.1016/j.cep.2020.107982⟩ |
| ISSN: | 0255-2701 |
| DOI: | 10.1016/j.cep.2020.107982⟩ |
| Popis: | In many applications, convective heat transfer enhancement is readily achieved by generating streamwise vortices and coherent flow structures using Vortex Generators (VG's) such as in multifunctional heat exchangers/reactors. Shape optimization of the VG's have been carried out over the last decades to find enhanced designs. Meanwhile, the design variables were limited to two or three such as angle of attack, roll angle and shape factor. In the present study, optimization using a large space exploration design via multiobjective function are conducted to find optimal VG designs. Simulations are performed over the VG shape in a rectangular parallel plate channels under forced convection laminar flow regime. Firstly the numerical results are validated vs experimental and numerical data from the open literature. Then, seven design parameters are considered with different incremental values which are: Attack Angle (α), Roll Angle (β), Base Angles (γ1 and γ2), Height (h), Length (l), and Shape Length (SL). Based on the new optimization study, a novel enhanced VG is found with thermal enhancement factor 35% relative to an empty channel and 14% better than literature results. Local analysis of the flow structure and heat transfer processes are conducted for the new optimized VG and for other classical VG shapes. |
| Databáze: | OpenAIRE |
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