Redesigned Swept Flat-Plate Experiment for Crossflow-Induced Transition Studies

Redesigned Swept Flat-Plate Experiment for Crossflow-Induced Transition Studies
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重新设计的横流诱导转变研究的扫掠平板实验

DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
H. Rosemann
H. Rosemann
中科院分区：
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文献类型：
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作者：
H. P. Barth;S. Hein;H. Rosemann

文献摘要

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本文介绍了重新设计的DLR后掠平板实验。它是基于著名的Bippes等人的横流参考实验，基本上由一个后掠平板和一个布置在其上的位移体组成。将描述新旧装置之间的差异以及重新设计的原因。实验是用于调查的机制，导致横流诱导层流湍流过渡在平板边界层和不同的驱动方法影响他们。三维边界层流场的主要特点，如发展的横流不稳定性和高频二次不稳定性的层流破裂的开始。
In this publication the redesigned DLR swept flat-plate experiment is introduced. It is based on the well-known crossflow reference experiment by Bippes et al. and consists essentially of a swept flat plate and a displacement body arranged above it. The differences between the old and the new setup and the reasons for the redesign will be described. The experiment is used for investigations on the mechanisms leading up to crossflow-induced laminar-turbulent transition in the flat-plate boundary layer and on different actuation methods for influencing them. The main features of the 3D boundary layer flow field such as the development of crossflow instabilities and the onset of high-frequency secondary instabilities during the laminar breakdown are presented.