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处于串列的两根圆柱体,其下游柱的振动响应比起孤立柱来要大得多,这主要是由于两者之间的流体动力存在着区别。在高雷诺数Re下,要想通过实验方式得到下游柱的流体动力系数存在着较大的困难,而在相同雷诺数Re下的孤立柱的流体动力系数却较为丰富。本文通过对已有的孤立柱和下游柱在高雷诺数Re下的流体动力系数的实验值的分析,得到了一种两者之间的联系式,并将下游柱流体动力系数的计算值与实验值进行了比较。本文的工作为预报处于尾流中工作的圆柱体在高雷诺数Re下的流固耦合振动响应提供了依据。
The two cylinders in tandem have a much larger vibrational response than the isolated columns, mainly due to the difference in hydrodynamic forces between the two cylinders. At high Reynolds number Re, it is difficult to obtain the hydrodynamic coefficients of the downstream columns experimentally, but the hydrodynamic coefficients of the isolated columns with the same Reynolds number Re are quite abundant. In this paper, by analyzing the experimental data of the existing hydrodynamic coefficients of isolated and downstream columns under high Reynolds number Re, a relation between the two is obtained and the relationship between the calculated value of hydrodynamic coefficient The experimental values were compared. The work in this paper provides a basis for predicting the fluid-structure interaction vibration response of a cylinder under wake at high Reynolds number Re.