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Advancing thermal performance through vortex generators morphing.

Samer Ali1, Talib Dbouk2, Guanghui Wang3,4

  • 1Univ. Lille, Institut Mines-Télécom, Univ. Artois, Junia, ULR 4515 - LGCgE, Laboratoire de Génie Civil et géo-Environnement, 59000, Lille, France. samer.ali@junia.com.

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This summary is machine-generated.

Optimizing rigid vortex generator (RVG) shapes using computational fluid dynamics and Pareto Front analysis significantly enhances heat transfer while minimizing pressure drop. This leads to more efficient, lightweight heat exchangers.

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Area of Science:

  • Fluid Dynamics
  • Heat Transfer
  • Thermodynamics

Background:

  • Rigid vortex generators (RVGs) are crucial for improving thermal performance in various technologies.
  • Optimizing RVG design is essential for balancing heat transfer enhancement and pressure drop.
  • Turbulent flow conditions necessitate advanced design strategies for effective heat exchange.

Purpose of the Study:

  • To determine the optimal shape of rigid vortex generators (RVGs) that minimizes pressure drop and maximizes local heat transfer.
  • To investigate the impact of RVG morphing techniques and hole introduction on thermal performance and mass reduction.
  • To achieve highly efficient and lightweight heat exchanger designs through optimized RVG configurations.

Main Methods:

  • Discrete Adjoint-Based Optimization was employed to identify optimal RVG designs.
  • Computational fluid dynamics (CFD) simulations were used in conjunction with the Pareto Front.
  • RVG morphing techniques and the introduction of holes were utilized to modify generator shapes.

Main Results:

  • An optimal RVG design was achieved at a computational cost of the order ~[Formula: see text].
  • The final morphed RVG design demonstrated a thermal performance factor of 1.28, with a [Formula: see text] heat transfer enhancement and moderate pressure drop increase.
  • Introducing holes reduced RVG mass by [Formula: see text] and increased the thermal performance factor by [Formula: see text] compared to the delta winglet pair (DWP) baseline.

Conclusions:

  • Optimized RVG designs can significantly improve thermal performance and reduce pressure drop.
  • RVG morphing and mass reduction strategies offer pathways to highly efficient, lightweight heat exchangers.
  • The study provides a framework for designing advanced heat exchange devices using CFD and optimization techniques.