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An intermittency factor weighted laminar kinetic energy transition model for heat transfer overshoot prediction

机译：传热超调预测的间歇因子加权层流动能转换模型

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摘要

An intermittency factor weighted laminar kinetic energy transition model appropriate for the prediction of overshoot in the transition region is proposed. Based on the hypersonic laminar kinetic energy transition model, study finds that the model predicts the overshoot when the transition onset is near the front of the configuration with a short transition zone, and greater gradients of relevant variables account for this circumstance. Therefore, the thought that accelerating the forming process of turbulent boundary layer in the late transition region to make greater variable gradients comes into being. Considering the convective and diffusive timescales of disturbances, an algebraic intermittency factor is presented and involved in the small-scale viscosity. In order to achieve the acceleration, compared with the DNS data as well, the intermittency factor is revised for a further step. Finally, the large-scale and small-scale viscosities are weighted by the revised intermittency factor. The revised model has been applied to flat plate boundary layer and boundary layer transitions over a blunt cone at different Reynolds numbers test cases. The results demonstrate the capacity of the model to reproduce overshoot with a reasonable degree of accuracy and reflect the effect of Reynolds number successfully. The revision originates from the perspective of transition model construction. A more sophisticated physics-based description of transition would be more preferable.
机译：提出了适合过渡区域超调预测的间歇因子加权层流动能过渡模型。基于高超音速层流动能转换模型，研究发现，当转换起始位置靠近具有短过渡区域的构型的前端时，该模型可以预测超调，并且相关变量的斜率更大，可以解释这种情况。因此，出现了加速后过渡区域中湍流边界层形成过程以产生更大的可变梯度的想法。考虑扰动的对流和扩散时间尺度，提出了代数间断因子，该因子涉及小尺度粘度。为了实现加速，与DNS数据相比，还对间歇性因子进行了修改，以进一步进行。最后，通过修订后的间歇性因子对大型和小型粘度进行加权。修改后的模型已应用于不同雷诺数测试用例的平板边界层和钝锥上的边界层过渡。结果表明，该模型具有以合理的准确度再现过冲的能力，并成功地反映了雷诺数的影响。该修订版是从过渡模型构建的角度出发的。基于过渡的更复杂的基于物理的描述将是更可取的。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2018年第2期|1115-1124|共10页
  • 作者

    Y.P. Qin; C. Yan; Z.H. Hao; J.J. Wang;

  • 作者单位

    School of Aeronautics Science and Engineering, Beihang University, Beijing 100191, China;

    School of Aeronautics Science and Engineering, Beihang University, Beijing 100191, China;

    School of Aeronautics Science and Engineering, Beihang University, Beijing 100191, China;

    School of Aeronautics Science and Engineering, Beihang University, Beijing 100191, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Boundary layer transition; Laminar kinetic energy; Overshoot; Hypersonic;

    机译：边界层过渡;层流动能超调;高超音速;

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