U形管内气液两相流诱导振动特性的实验研究

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摘要实验研究了横向U形管内气液两相流诱导振动的动态响应特性。重点研究了流型形式、气相表观流速Ug、液相表观流速Ul、体积含气率β等对振动响应强度arms的影响。结果表明，横向U形管振动主要表现为面内方向且为某一阶固有频率附近的低频振动，同时表现为拍振现象。U形弯头轴向不同测点振动频谱幅值呈现近似抛物线变化，在弯头90°处达到最大。arms由大到小依次为段塞-波形流、环状-波形流、环状-弥散流、塞状-泡状流和分层-塞状流。固定Ul时，arms随Ug的增加呈现先缓慢增长而后快速增大的趋势，快速增大的分界线约为Ug = 1 m/s；固定Ug时，arms随Ul的增加逐渐增大。较小β时，arms随β的增加呈现非常缓慢增长的趋势；当β增加到某节点时，振动强度快速增大，且快速增大的β节点值随液相表观流速Ul的增加而降低。

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	马晓旭1
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	刘帅1
	张政2
	田茂诚2

关键词 ： U形管, 振动响应强度, 表观流速, 流型, 体积含气率

Abstract：The dynamic response characteristic of gas-liquid two-phase flow-induced vibration in a transverse U-shaped tube was studied experimentally. The effects of flow pattern, superficial gas velocity Ug, superficial gas velocity Ul, volume void fraction β on vibration response arms were studied. The results show that the vibration response in the transverse U-tube mainly presents the flapping phenomenon in plane direction at low frequency. The amplitude of the frequency spectrum presents the approximate parabola distribution along the axial measured points of the U-shaped elbow and reaches the maximum at the 90-degree position of the elbow. The order of the arms is slug-wavy flow, annular-wavy flow, annular dispersed flow, plug-bubble flow and plug-stratified flow. For a given Ug, the arms presents a trend of approximately flat growth and then a sharp increase with the increase of Ug. The boundary of the sharp increase is about Ug = 1m/s. For a given Ug, the arms increases with the rise of Ul. For a given β, arms presents a very slow growth trend with the increasing of β. However, when β increase to a certain value, arms increases greatly with the rise of β. The certain value decreases with the increasing of superficial liquid velocity.

Key words： U-shaped tube vibration response intensity superficial velocity flow pattern volume void fraction

收稿日期: 2022-09-27 出版日期: 2023-07-28

引用本文:

马晓旭1,2，刘帅1，张政2，田茂诚2. U形管内气液两相流诱导振动特性的实验研究[J]. 振动与冲击, 2023, 42(14): 76-83.
MA Xiaoxu1,2，LIU Shuai1，ZHANG Zheng2，TIAN Maocheng2. Experimental study on the gas-liquid two-phase flow-induced vibration in a U-tube. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(14): 76-83.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I14/76

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