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Optimization of a Mach-6 Quiet Wind-Tunnel Nozzle

机译：Mach-6静音风洞喷嘴的优化

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摘要

Numerical simulations were conducted to optimize the shape and wall-temperature distribution of the Notre Dame Mach 6 quiet tunnel nozzle. The design was optimized by minimizing the overall nozzle length while maintaining sufficiently low disturbance amplification factors and uniform flow at the exit plane. The Boeing Computational Fluid Dynamics flow solver was used to compute laminar-mean-flow solutions for the various geometries and temperature distributions defined by a design of experiments. The Langley Stability and Transition Analysis Code was then used to compute amplification factors for Tollmien-Schlichting waves, second-mode waves, and Gortler vortices. Based on the square root of the sum of the squares of these N-factors, response surfaces were generated that were used to optimize the nozzle design and wall-temperature distribution. Four nozzles with different lengths were developed, and an optimal wall-temperature distribution was determined for each. The total N-factor was found to range from 5.1 to 7.9, with longer nozzles being more stable. All designs reflect an improvement on a baseline design developed in the late 1990s at Purdue University.
机译：进行了数值模拟，以优化Notre Dame Mach 6静音隧道喷嘴的形状和壁温分布。通过最小化总喷嘴长度，同时保持足够低的干扰放大因子和出口平面的均匀流动来优化设计。波音计算流体动力学流动求解器用于计算由实验设计定义的各种几何形状和温度分布的层流平均值解决方案。然后使用Langley稳定性和跃迁分析代码来计算Tollmien-Schlichting波，第二模式波和Gortler涡的放大因子。基于这些N因子平方和的平方根，生成了响应表面，这些响应表面用于优化喷嘴设计和壁温分布。开发了四个不同长度的喷嘴，并确定了每个喷嘴的最佳壁温分布。发现总的N系数范围为5.1到7.9，喷嘴越长越稳定。所有设计均反映了1990年代末普渡大学开发的基准设计的改进。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2018年第2期|315-321|共7页
  • 作者

    Lakebrink Matthew T.; Bowcutt Kevin G.; Winfree Troy; Huffman Christopher C.; Juliano Thomas J.;

  • 作者单位

    Boeing Co, Boeing Res & Technol, Chicago, IL 60606 USA;

    Boeing Co, Boeing Res & Technol, Chicago, IL 60606 USA;

    Boeing Co, Boeing Res & Technol, Chicago, IL 60606 USA;

    Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA;

    Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA;

  • 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
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