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Smoothed Particle Hydrodynamic Investigation of Model Vibrations in Hypersonic Flow
Computers & Fluids ( IF 2.8 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.compfluid.2020.104538
Tyler J. Englestad , Jason T. Cassibry

Abstract Sting vibrations in hypersonic wind tunnel data are investigated and modeled to show how pressure fluctuations are affected. This is in contrast with lower-speed flow where the sting's resonant frequencies are simply superimposed upon the data, leading to their simple removal, either with notch (band-stop) filtering or long-run averaging. The fundamental flow alteration at hypersonic velocities, as demonstrated in this paper, show post-processing noise removal is likely no longer trivial. This paper presents results for Mach 5 flow over 3D right circular cones and a capability to simulate these phenomena using the mesh-free Lagrangian Smoothed Particle Hydrodynamics (SPH) method.

中文翻译:

高超声速流动中模型振动的平滑粒子流体动力学研究

摘要 对高超音速风洞数据中的刺痛振动进行了研究和建模,以显示压力波动是如何受到影响的。这与低速流形成对比,在低速流中,刺的共振频率简单地叠加在数据上,从而可以通过陷波(带阻)滤波或长期平均来简单地去除它们。如本文所示,高超声速下的基本流动变化表明,后处理噪声去除可能不再微不足道。本文介绍了 3D 直圆锥上 5 马赫流量的结果,以及使用无网格拉格朗日平滑粒子流体动力学 (SPH) 方法模拟这些现象的能力。
更新日期:2020-06-01
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