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To investigate the predictive capability and computational accuracy of typical turbulence models in CFD numerical simulations for array jet impingement cooling, five turbulence models in the commercial software ANSYS CFX, k-ε, RNG k-ε, k-ω, SST k-ω, and SST γ-θ, were employed to simulate the three-dimensional flow and heat transfer in array jet impingement cooling. Under the condition of Re = 50,000, the experimental and simulated results were compared and analyzed, including the crossflow distribution in the impingement chamber, flow rate distribution among jet rows, target surface pressure distribution, and heat transfer coefficient distribution. Additionally, the predictive results of different turbulence models for local Mach number distribution, turbulent kinetic energy distribution, and flow field in the impingement chamber were numerically studied. The study found that the two-equation SST k-ω turbulence model exhibited higher agreement with experimental data, while the k-ε, RNG k-ε, and k-ω models showed certain deviations from experimental measurements. Compared to the SST k-ω model, the transition-sensitive SST γ-θ model did not demonstrate significant advantages in the numerical prediction of array jet impingement cooling.

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Study on the Predictive Accuracy of Different Turbulence Models for Jet Array Impingement Cooling

  • 会议论文

  • 发表日期：

    2026年

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  • Bin Wu,
  • Tai Zeng,
  • Kai Wang,
  • Fei Xie,
  • Zhengliang Su

摘要

To investigate the predictive capability and computational accuracy of typical turbulence models in CFD numerical simulations for array jet impingement cooling, five turbulence models in the commercial software ANSYS CFX, k-ε, RNG k-ε, k-ω, SST k-ω, and SST γ-θ, were employed to simulate the three-dimensional flow and heat transfer in array jet impingement cooling. Under the condition of Re = 50,000, the experimental and simulated results were compared and analyzed, including the crossflow distribution in the impingement chamber, flow rate distribution among jet rows, target surface pressure distribution, and heat transfer coefficient distribution. Additionally, the predictive results of different turbulence models for local Mach number distribution, turbulent kinetic energy distribution, and flow field in the impingement chamber were numerically studied. The study found that the two-equation SST k-ω turbulence model exhibited higher agreement with experimental data, while the k-ε, RNG k-ε, and k-ω models showed certain deviations from experimental measurements. Compared to the SST k-ω model, the transition-sensitive SST γ-θ model did not demonstrate significant advantages in the numerical prediction of array jet impingement cooling.