Turbulence Kinetic Energy Balance in the Wake of a Sharp-edged Highly Swept Delta Wing

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• 作者：P. Panagiotou ; A. Sideridis ; K. Yakinthos ; A. Goulas
• 关键词：Delta wing ; Hot ; wire anemometry ; Measurement ; Turbulence kinetic energy balance ; Vortex breakdown ; Wake
• 刊名：Flow, Turbulence and Combustion
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：95
• 期：1
• 页码：121-142
• 全文大小：3,060 KB
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• 作者单位：P. Panagiotou (1)
  A. Sideridis (1)
  K. Yakinthos (1)
  A. Goulas (1)
  
  1. Laboratory of Fluid Mechanics & Turbomachinery, Department of Mechanical Engineering, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
  
• 刊物类别：Engineering
• 刊物主题：Physics
  Mechanics
  Automotive Engineering
  
• 出版者：Springer Netherlands
• ISSN：1573-1987

文摘

Hot-wire measurements in the wake of a flat plate delta wing, at a fixed angle of attack, were carried-out in order to investigate its turbulence kinetic energy budget. The purpose of this study is to help acquire more information about the vortex structure formed in the wake region of the delta wing and to provide data for turbulence models-validation. Point measurements were conducted in five planes perpendicular to the flow, on a high spatial resolution two–dimensional measurement grid that allowed precise derivative calculations of the flow quantities needed for the derivation of the kinetic energy budget. The turbulence kinetic energy convection, production, viscous diffusion and turbulence diffusion terms were directly obtained from the experimental data, whereas dissipation and pressure diffusion terms were calculated indirectly using techniques presented and validated in previous studies. All of the terms of the turbulence kinetic energy budget, along with the velocity components and the Reynolds stresses, are presented and discussed.