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本文实验研究由两个或三个并排圆柱体所产生的复杂尾迹 .其中一个圆柱被加热 ,流体尾迹中最高温度比环境温度高 1℃左右 ,对湍流场影响很小 .用X热线和一根冷线相结合的三线探头分别测量速度和温度的脉动 .以一个圆柱尾迹的实验数据为基础 ,用位置叠加假设来计算复杂尾迹 ,并与实际测量结果比较 ,用以检查该假设在圆柱绕流复杂尾迹的适用情况 .结果表明 ,利用位置叠加假设 ,可以根据简单尾迹的实验结果来对复杂尾迹的平均速度进行描述 .对二阶的速度量有较好的定性分析结果 .但对三阶量无论是定性还是定量都有较大的差异
In this paper, we study the complicated wake produced by two or three parallel cylinders, one of which is heated, and the highest temperature in the wake is about 1 ℃ higher than the ambient temperature, which has little effect on the turbulent flow field. Cold line combined with the three-line probe were measured speed and temperature pulsation.On the basis of the experimental data of a cylindrical wake, the location of the complex stack to calculate the complex wakes and hypotheses to compare with the actual measurement results to check the assumption that the flow around the cylinder The results show that the position superposition assumption can be used to describe the average velocity of the complex wake based on the experimental results of the simple wake and the qualitative analysis of the second order velocity.However, Whether qualitative or quantitative have greater differences