【摘要】 通过试验 ,对气液两相流中相同直径的 3排错列圆柱表面上旋涡的脱落与节径比、含气率的关系进行了研究 .研究发现 :旋涡的周期性脱落仅在含气率α小于等于 0 .14的范围内发生 ;对于横向节径比s1/d小于等于 2 .0的错列圆柱 ,隙缝流呈现双稳态的偏斜流 ,而横向节径比s1/d大于 2 .0时 ,双稳态的偏斜流消失 ;两相流斯特拉赫数随含气率的增加而减小 .更多还原

【Abstract】 The relationship between the vortex shedding from the surface of three row circular cylinders of the same diameter in staggered arrangement and the ratio of pitch to diameter or void friction is experimentally investigated. The results show that periodical vortex shedding happens when the void fraction is no more than 0.14. As the ratio of transverse pitch to diameter is no more than 2.0, gap-flow is bistable deflective flow. But bistable deflective flow disappears as the ratio more than 2.0. Strouhal number in two-phase flow reduces with the increase of the void friction.更多还原