INVESTIGATION OF THE FREE TURBULENT SWIRL JET BEHIND THE AXIAL FAN
作者: Novica Z. Janković
刊名: Thermal Science, 2018, Vol.21 (Supplement), pp.S771-S782
来源数据库: Society for Thermal Engineers of Serbia
DOI: https://doi.org/10.2298/TSCI160417197J
关键词: Free jetTurbulent swirlLaser Doppler anemometryAxial fan
原始语种摘要: Experimental investigation of the free turbulent swirl jet behind the axial fan, by use of the three-component laser Doppler anemometry is presented in this paper. Axial fan generates Rankine swirl. Measurements have been performed in five vertical measuring sections downstream for one rotation number 1500 rpm. Time averaged velocity components and their profile transformation downstream were investigated. Statistical moments of the second, third and fourth order have been calculated and presented. The highest turbulence levels are reached in the central zone, more precisely – shear layer zone and in the injection zone. Skewness and flatness factors differ from normal Gaussian distributions. Turbulence swirl flow anisotropy is investigated by applying invariant maps. Most of the obtained...
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关键词翻译
关键词翻译
  • swirl 旋涡
  • anemometry 风速测定法
  • turbulence 湍流紊流
  • component 成分
  • Doppler 多普勒
  • flatness 平面度
  • axisymmetric 轴对称的
  • invariant 不变量
  • Rankine 兰金
  • rotation 旋转