大型氦低温系统低温调节阀流致振动计算分析  

Calculation of fluid-induced vibration of cryogenic regulating valve in large He cryogenic system

作　　者：文俊 张鹏[1] 王先进[1] 白峰[1] 范大军 张军辉[1] 牛小飞[1] Wen Jun;Zhang Peng;Wang Xianjin;Bai Feng;Fan Dajun;Zhang Junhui;Niu Xiaofei(Institute of Modem Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《低温与超导》2022年第5期76-84,共9页Cryogenics and Superconductivity

基　　金：国家重大科技基础设施项目(2017-000052-75-01-000590)资助。

摘　　要：加速器驱动的嬗变研究装置与强流重离子加速器装置采用大型氦低温系统对超导腔进行冷却并维持其低温超导环境。针对低温系统中冷量分配所使用的低温调节阀的力学特性,采用了有限体积及有限元方法对低温调节阀在不同工作温度下的流致振动现象进行了数值计算。计算结果显示,在流量突然增大的工况下,低温调节阀及与其相连接的管道由于流体的冲击形成了周期性震动,并在快速达到峰值后逐渐衰减为稳定的偏移位移,阀门不再震动。A large helium cryogenic system was used to cool the superconducting cavity and maintain its cryogenic superconducting environment in the High Intensity Heavy ion Accelerator Facility(HiAF) and China initiative Accelerator Driven System(CiADS). In this paper, finite volume and finite element methods were used to numerically calculate the fluid-induced vibration of the cryogenic regulating valve at different working temperatures according to the mechanical characteristics of the cryogenic regulating valve used for cold quantity distribution in cryogenic system. The calculation results show that under the condition of sudden increase of flow, the cryogenic regulating valve and its connected pipeline form periodic vibration due to the impact of fluid, and gradually attenuate to a stable offset displacement after rapidly reaching the peak value, and the valve no longer vibrates.

关 键 词：氦低温系统 低温调节阀 流致振动 

分 类 号：TK124[动力工程及工程热物理—工程热物理]