Experimental study on fluidelastic instability of rotated triangular tube bundles subjected to two-phase cross flow-critical velocity

被引：0
作者：
Tan T.-C. [1 ]
Gao L.-X. [1 ]
Li P.-Z. [1 ]
Jiang T.-Z. [1 ]
Ma J.-Z. [1 ]
Xi Z.-D. [1 ]
机构：
[1] Nuclear Power Institute of China, Chengdu
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 02期
关键词：
Critical velocity; Flow-induced vibration; Fluidelastic instability; Two-phase cross flow; Vortex shedding;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.02.010
中图分类号：
学科分类号：
摘要：
Vibration characteristic experiments of fluidelastic instability on the air-water two-phase test device are conducted about rotated triangular tube array with the pitch-to-diameter ratio of 1.48 subjected to air-water cross-flow. Both of lift direction and draft direction of tube bundles are tested. Critical velocities of two different frequency tube bundles for fluidelastic instability are measured in different void fractions of 0, 20%, 40%, 60%, 80% and 90%. The results show that, fluidelastic instability does not occur in draft direction. The critical velocity increases with the increase of void fraction for tube bundle with the same frequency, and is proportional to tube frequency for the same void fraction. When void fraction is less than 20%, vortex shedding occurs in the heat transfer tube bundle. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：272 / 277
页数：5
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