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中文摘要：
在低紊流度的均匀流场中，对10种不同角部处理的二维方柱模型进行了刚性模型测压试验，试验雷诺数的变化范围为Re≈1．0×105～4．8×105。根据各模型的阻力系数随雷诺数的变化规律将10个模型进行了分类，然后分类讨论了各模型的风压分布规律，并尝试从气流扰流的角度揭示模型的角部处理对方柱模型气动特性的影响机理。研究表明，在试验雷诺数范围内，切角率B／D≤15％的模型和圆角率R／D≤15％的模型的气动特性基本不随雷诺数而改变，而圆角率R／D≥20％的模型的雷诺数效应明显。对于圆角率R／D=20％、30％和40％的模型，随着圆角率的增大，风压分布发生改变所对应的雷诺数随之减小。
英文摘要：
Pressure measurement tests on 10 2-D square prisms with various corner treatments were carried out in uniform flow field with low turbulence for the Reynolds number ranging from Re≈1.0×105 to 4.8×105Firstly, all 10 models were categorized according to the variation law of drag coefficient with Reynolds number, and then the wind pressure distributions for these models were discussed according to their categories. Influence mechanisms of corner treatments on aerodynamic behaviors of square prisms were revealed from the perspective of the variation of flow around the model. The results show that the aerodynamic behaviors of models with the corner chamfering ratio B/D ≤ 15% and the corner rounding ratio as R/D ≤ 15 % are not affected by the Reynolds number, while the aerodynamic behaviors of models with R/D≥20% are obviously affected by the Reynolds number. For the models with R/D= 20% , 30% and 40%, the Reynolds number corresponding to the obvious change of wind pressure distributions decrease with the increase of the corner rounding ratio.
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