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A Review of Airside Heat Transfer Augmentation with Vortex Generators on Heat Transfer Surface

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  • Lei Chai

    (RCUK Centre for Sustainable Energy Use in Food Chains (CSEF), Institute of Energy Futures, Brunel University London, Uxbridge, Middlesex UB8 3PH, UK)

  • Savvas A. Tassou

    (RCUK Centre for Sustainable Energy Use in Food Chains (CSEF), Institute of Energy Futures, Brunel University London, Uxbridge, Middlesex UB8 3PH, UK)

Abstract

Heat exchanger performance can be improved via the introduction of vortex generators to the airside surface, based on the mechanism that the generated longitudinal vortices can disrupt the boundary layer growth, increase the turbulence intensity and produce secondary fluid flows over the heat transfer surfaces. The key objective of this paper is to provide a critical overview of published works relevant to such heat transfer surfaces. Different types of vortex generator are presented, and key experimental techniques and numerical methodologies are summarized. Flow phenomena associated with vortex generators embedded, attached, punched or mounted on heat transfer surfaces are investigated, and the thermohydraulic performance (heat transfer and pressure drop) of four different heat exchangers (flat plate, finned circular-tube, finned flat-tube and finned oval-tube) with various vortex-generator geometries, is discussed for different operating conditions. Furthermore, the thermohydraulic performance of heat transfer surfaces with recently proposed vortex generators is outlined and suggestions on using vortex generators for airside heat transfer augmentation are presented. In general, the airside heat transfer surface performance can be substantially enhanced by vortex generators, but their impact can also be significantly influenced by many parameters, such as Reynolds number, tube geometry (shape, diameter, pitch, inline/staggered configuration), fin type (plane/wavy/composite, with or without punched holes), and vortex-generator geometry (shape, length, height, pitch, attack angle, aspect ratio, and configuration). The finned flat-tube and finned oval-tube heat exchangers with recently proposed vortex generators usually show better thermohydraulic performance than finned circular tube heat exchangers. Current heat exchanger optimization approaches are usually based on the thermohydraulic performance alone. However, to ensure quick returns on investment, heat exchangers with complex geometries and surface vortex generators, should be optimized using cost-based objective functions that consider the thermohydraulic performance alongside capital cost, running cost of the system as well as safety and compliance with relevant international standards for different applications.

Suggested Citation

  • Lei Chai & Savvas A. Tassou, 2018. "A Review of Airside Heat Transfer Augmentation with Vortex Generators on Heat Transfer Surface," Energies, MDPI, vol. 11(10), pages 1-45, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2737-:d:175288
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    References listed on IDEAS

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    1. Ahmed, H.E. & Mohammed, H.A. & Yusoff, M.Z., 2012. "An overview on heat transfer augmentation using vortex generators and nanofluids: Approaches and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(8), pages 5951-5993.
    2. Lotfi, Babak & Zeng, Min & Sundén, Bengt & Wang, Qiuwang, 2014. "3D numerical investigation of flow and heat transfer characteristics in smooth wavy fin-and-elliptical tube heat exchangers using new type vortex generators," Energy, Elsevier, vol. 73(C), pages 233-257.
    3. Lotfi, Babak & Sundén, Bengt & Wang, Qiuwang, 2016. "An investigation of the thermo-hydraulic performance of the smooth wavy fin-and-elliptical tube heat exchangers utilizing new type vortex generators," Applied Energy, Elsevier, vol. 162(C), pages 1282-1302.
    4. Zhao, X.B. & Tang, G.H. & Ma, X.W. & Jin, Y. & Tao, W.Q., 2014. "Numerical investigation of heat transfer and erosion characteristics for H-type finned oval tube with longitudinal vortex generators and dimples," Applied Energy, Elsevier, vol. 127(C), pages 93-104.
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    Cited by:

    1. Ruben Gutierrez-Amo & Unai Fernandez-Gamiz & Iñigo Errasti & Ekaitz Zulueta, 2018. "Computational Modelling of Three Different Sub-Boundary Layer Vortex Generators on a Flat Plate," Energies, MDPI, vol. 11(11), pages 1-21, November.
    2. Aridi, Rima & Faraj, Jalal & Ali, Samer & Lemenand, Thierry & khaled, Mahmoud, 2022. "A comprehensive review on hybrid heat recovery systems: Classifications, applications, pros and cons, and new systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
    3. Marcin Łęcki & Dariusz Andrzejewski & Artur N. Gutkowski & Grzegorz Górecki, 2021. "Study of the Influence of the Lack of Contact in Plate and Fin and Tube Heat Exchanger on Heat Transfer Efficiency under Periodic Flow Conditions," Energies, MDPI, vol. 14(13), pages 1-25, June.
    4. Junjie Zhao & Bin Zhang & Xiaoli Fu & Shenglin Yan, 2021. "Numerical Study on the Influence of Vortex Generator Arrangement on Heat Transfer Enhancement of Oil-Cooled Motor," Energies, MDPI, vol. 14(21), pages 1-17, October.
    5. Feng, Zhenfei & Jiang, Ping & Zheng, Siyao & Zhang, Qingyuan & Chen, Zhen & Guo, Fangwen & Zhang, Jinxin, 2023. "Experimental and numerical investigations on the effects of insertion-type longitudinal vortex generators on flow and heat transfer characteristics in square minichannels," Energy, Elsevier, vol. 278(PA).
    6. Rishikesh Sharma & Dipti Prasad Mishra & Marek Wasilewski & Lakhbir Singh Brar, 2023. "Application of Response Surface Methodology and Artificial Neural Network to Optimize the Curved Trapezoidal Winglet Geometry for Enhancing the Performance of a Fin-and-Tube Heat Exchanger," Energies, MDPI, vol. 16(10), pages 1-30, May.

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