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In this paper, the resistance coefficient of 90° bending pipeBending pipe with 45° bending pipeBending pipe and different ratios of curvature radius (R/D = 1, 2, 3, 4, 5) was studied by experimental and numerical simulationNumerical simulation methods, and the laws of pressure distribution, velocity vector, secondary flow and flow trajectory in bending pipeBending pipe were analyzed, and the characteristics of the flow field in bending pipeBending pipe with different ratio of curvature radius to diameter were emphatically analyzed. The results show that the simulationSimulation results of the RNG k-ε turbulence model agree well with the experimental results. Under the same Re, the larger the R/D, the smaller the local resistance coefficientLocal resistance coefficient ξ. When R/D increases the curvature in the range of 1–3, the local resistance coefficientLocal resistance coefficient ξ can be significantly reduced, and when R/D increases the curvature, the local resistance does not change significantly.

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Experimental and Numerical Simulation of 45° Bending and 90° Bending with Different Curvature

  • 会议论文

  • 发表日期：

    2025年

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  • Jukuan Gao,
  • Donghua Liu,
  • Pengliang Dou,
  • Gongxun Wang,
  • Xiao Wu

摘要

In this paper, the resistance coefficient of 90° bending pipeBending pipe with 45° bending pipeBending pipe and different ratios of curvature radius (R/D = 1, 2, 3, 4, 5) was studied by experimental and numerical simulationNumerical simulation methods, and the laws of pressure distribution, velocity vector, secondary flow and flow trajectory in bending pipeBending pipe were analyzed, and the characteristics of the flow field in bending pipeBending pipe with different ratio of curvature radius to diameter were emphatically analyzed. The results show that the simulationSimulation results of the RNG k-ε turbulence model agree well with the experimental results. Under the same Re, the larger the R/D, the smaller the local resistance coefficientLocal resistance coefficient ξ. When R/D increases the curvature in the range of 1–3, the local resistance coefficientLocal resistance coefficient ξ can be significantly reduced, and when R/D increases the curvature, the local resistance does not change significantly.