【摘要】 对相同直径的 3排错列圆柱表面的旋涡脱落工况进行了试验研究。测试圆柱采用Φ30mm的有机玻璃圆柱。试验时两相隙缝流Re数范围为 2 .0× 10 4～ 6 .0× 10 4,含气率的范围在 0～ 0 .3之间。通过试验分析获得了不同排列形式的错列管束中两相流斯特拉赫数 ;试验发现两相流斯特拉赫数Sttp随含气率的增加而减小 ;提出了旋转正三角形排列的错列管束的斯特拉赫数曲线 ;指出可以近似应用单相流时的Weaver曲线作为两相流中旋转正方形排列和正三角形排列管束旋涡脱落诱发管束振动的判别标准更多还原

【Abstract】 The vortex shedding condition of three rows of staggered circular cylinder with a same diameter was experimentally investigated. The cylinders being tested were made of acrylic glass cylinders with a diameter of 30mm. During the tests the two-phase gap-flow Reynolds number ranges from 2.0×10 4～6.0×10 4 and the range of void fraction, from 0 - 0.3. By way of experimental analyses the Strouhal number of two-phase flows was determined in staggered tube bundles with different layout modes. The test results indicate that the Strouhal number of the two-phase flows decreases with an increase in the void fraction. The characteristic curves of Strouhal numbers are presented for the staggered tube bundles with a rotating regular-triangle layout. It is noted that Weaver curves of single-phase flows can be approximately used as discrimination criteria for the tube bundle vibrations induced by the vortex shedding in rotating-square arranged and regular-triangle arranged tube bundles in two-phase flows.更多还原