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DLR TAU Simulations for the Second AIAA Sonic Boom Prediction Workshop

机译:第二届AIAA音爆预测研讨会的DLR TAU模拟

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摘要

The accurate prediction of the sonic boom is essential for the development of a future low-boom supersonic aircraft. In this paper, geometries and grids provided by the Second AIAA Sonic Boom Prediction Workshop are used to improve a best practice for predicting near-field pressure signatures with the DLR TAU code. The workshop-provided low-boom geometries with different complexities, such as an axisymmetric body, a delta-wing body, and a full aircraft configuration with a cruciform tail and an engine. Results for the DLR TAU simulations on the workshop-provided grids are presented for different grid refinement levels using both Euler and Reynolds-averaged Navier-Stokes simulations. In addition to the provided grids, mixed-element grids with varying setups are generated. The positions of the shocks and expansions are essentially identical for all medium to fine grids but vary for very coarse grids due to the surface triangulation. The pressure magnitude at shocks and expansions is higher for simulations on fine grids compared to coarse grids. It is shown that the influence of the viscosity on the pressure signatures is more significant than the influence of the grid resolution. The agreement between TAU solutions and other participants' solutions is good.
机译:声波繁荣的准确预测对于未来低空超音速飞机的发展至关重要。在本文中,第二届AIAA声波爆发预测研讨会提供的几何形状和网格用于改进DLR TAU代码预测近场压力特征的最佳实践。车间提供的低吊杆几何形状具有不同的复杂性,例如轴对称机身,三角翼机身以及带有十字形尾巴和发动机的完整飞机配置。使用Euler和Reynolds平均Navier-Stokes模拟,针对不同的网格细化级别,提供了车间提供的网格上DLR TAU模拟的结果。除了提供的网格外,还会生成具有不同设置的混合元素网格。冲击和膨胀的位置对于所有中到细的网格基本上是相同的,但是由于表面三角剖分,对于非常粗糙的网格,其位置会有所不同。与粗网格相比,在细网格上进行仿真时,冲击和膨胀时的压力幅度更高。结果表明,粘度对压力信号的影响比网格分辨率的影响更为显着。 TAU解决方案与其他参与者的解决方案之间的协议很好。

著录项

  • 来源
    《Journal of Aircraft》 |2019年第3期|912-927|共16页
  • 作者

    Kirz Jochen; Rudnik Ralf;

  • 作者单位

    DLR, German Aerosp Ctr, Inst Aerodynam & Flow Technol, Transport Aircraft Branch, Lilienthalpl 7, D-38108 Braunschweig, Germany;

    DLR, German Aerosp Ctr, Inst Aerodynam & Flow Technol, Transport Aircraft Branch, Lilienthalpl 7, D-38108 Braunschweig, Germany;

  • 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

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