并列弹性双圆柱在均匀流场中的流体激励力的研究

EXPERIMENTAL RESEARCH FOR FLUID FORCE OF TWO ELASTIC CIRCULAR CYLINDERS IN SIDE BY SIDE ARRANGEMENTS WHEN SUBJECTED TO UNIFORM CROSSFLOW

实验研究了并列弹性双圆柱体在均匀流场中的水动力特性，其中包括柱表面稳态及脉动压力系数，稳态阻力及升力系数，脉动阻力和升力系数，结果表明：Ｖ＿ｒ＞Ｖ＿（ｒｃ）时，柱的振动对其流体激励力有明显影响。

This paper presents the experimental investigation into hydrodynamicforce of two elastic circular cylinders in side by side arrangements under various gap ratiosT/D in the range of 4.19 ×10￣4 < Re < 9.1×10￣4. The steady and fluctuating pressuredistributions,steady drag and lift and fluctuating drag and lift force were obtained.Theresults show that as V_r>V_(rc),the oscillations of the cylinders affect not only the steadydrag and lift coefficients,but fluctuating drag and lift coefficients as well.There were abruptchanges for hydrodynamic force when T/D is within the critical spacing ratios。