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<p>In the present study, we evaluate RANS-like, transport equations-based models for predicting laminar-turbulent transition over a scaled model of the BOLT flight configuration that was tested in wind tunnel test facilities. Based on the availability of the experimental results, comparisons are made between computations from several pre-existing transition models and computational fluid dynamics (CFD) codes, with an emphasis on using the same computational meshes and flow conditions for all computations. The analysis covers the sensitivity of the transition predictions to the input parameters for five different transition models (four mainstream models designed for low-speed flows and a uniquely high-speed model), grid resolution, and the details of model implementation across three different flow solvers. The results show that the phenomenological models can describe significant aspects of the measured transition front. However, a number of additional improvements are required before these models can offer more reliable estimates of transition in high-speed flows.</p>

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Predicting hypersonic boundary-layer transition on complex geometries with RANS models

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Luigi Cutrone,
  • Antonio Schettino,
  • José I. Cardesa,
  • Grégory Delattre,
  • James G. Coder,
  • Steven Qiang,
  • Ethan Vogel,
  • Meelan Choudhari

摘要

In the present study, we evaluate RANS-like, transport equations-based models for predicting laminar-turbulent transition over a scaled model of the BOLT flight configuration that was tested in wind tunnel test facilities. Based on the availability of the experimental results, comparisons are made between computations from several pre-existing transition models and computational fluid dynamics (CFD) codes, with an emphasis on using the same computational meshes and flow conditions for all computations. The analysis covers the sensitivity of the transition predictions to the input parameters for five different transition models (four mainstream models designed for low-speed flows and a uniquely high-speed model), grid resolution, and the details of model implementation across three different flow solvers. The results show that the phenomenological models can describe significant aspects of the measured transition front. However, a number of additional improvements are required before these models can offer more reliable estimates of transition in high-speed flows.