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首页> 外文期刊>Journal of Aircraft >Boundary-Layer Stability Analysis of the Mean Flows Obtained Using Unstructured Grids
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Boundary-Layer Stability Analysis of the Mean Flows Obtained Using Unstructured Grids

机译：使用非结构化网格获得的平均流的边界层稳定性分析

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摘要

Boundary-layer stability analyses of mean flows extracted from unstructured-grid Navier-Stokes solutions have been performed. A procedure has been developed to extract mean flow profiles from the FUN3D unstructured-grid solutions for the purpose of stability analysis. Extensive code-to-code validations were performed by comparing the extracted mean flows as well as the corresponding stability characteristics to the predictions based on structured-grid mean flow solutions. Comparisons were made for a set of progressively complex geometric configurations ranging from a simple flat plate to a full aircraft configuration: a modified Gulfstream Ⅲ with a natural laminar-flow glove. The results for the swept wing flow over the wing-glove assembly point to the need for stability analysis based on Navier-Stokes solutions or possibly fully three-dimensional boundary-layer codes when the underlying flow develops strong three-dimensionality. The effect of grid resolution, mean flow convergence, and low-order interpolation to a stability grid on metrics relevant to linear stability of the boundary-layer flow are also examined to provide guidelines for the use of both structured and unstructured grids in practical applications related to transition prediction for swept wing boundary layers.
机译：从非结构化网格Navier-Stokes解中提取的平均流的边界层稳定性分析已经进行。为了稳定性分析，已经开发了一种从FUN3D非结构化网格解决方案中提取平均流量剖面的程序。通过将提取的平均流量以及相应的稳定性特征与基于结构化网格平均流量解决方案的预测进行比较，进行了广泛的代码到代码验证。对一组渐进复杂的几何形状（从简单的平板到完整的飞机形状）进行了比较：经过改进的带有天然层流手套的湾流Ⅲ。掠过机翼-手套组件上方的机翼气流的结果表明，当基础气流发展出强三维性时，需要基于Navier-Stokes解或可能完全三维边界层代码的稳定性分析。还检查了网格分辨率，平均流收敛和对稳定性网格的低阶插值对与边界层流线性稳定性相关的度量的影响，从而为在相关实际应用中使用结构化和非结构化网格提供了指导进行扫掠机翼边界层的过渡预测。

著录项

  • 来源
    《Journal of Aircraft》 |2015年第1期|49-63|共15页
  • 作者

    Wei Liao; Mujeeb R. Malik; Elizabeth M. Lee-Rausch; Fei Li; Eric J. Nielsen; Pieter G. Buning; Meelan Choudhari; Chau-Lyan Chang;

  • 作者单位

    National Institute of Aerospace, Hampton, Virginia 23666;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

    NASA Langley Research Center, Hampton, Virginia 23681;

  • 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
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