流体机械

2016, v.44;No.523(01) 24-28+86

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超(超)临界疏水阀开启过程管道水锤抑制研究
Study on Water Hammer Suppression of Pipeline in Opening Process of Ultra-supercritical Steam Trap

李树勋;娄燕鹏;徐晓刚;丁强伟;
LI Shu-xun;LOU Yan-peng;XU Xiao-gang;DING Qiang-wei;Lanzhou University of Technology;Machinery Industry Pump and Special Valve Engineering Research Center;

摘要(Abstract):

针对超(超)临界疏水阀开启过程中管道水锤振动问题,采用特征线法对阀控管道水锤瞬变模型进行了数值计算,运用Matlab求解得到了疏水阀在不同流量特性、不同节流效应下开启时管道中流量和水锤压头的时域曲线。研究表明:选用等百分比流量特性的疏水阀,可以减缓阀开启时阀后管道的水锤现象,同时节流效应对疏水阀开启时阀后管道水锤的影响显著,节流越明显,管道中水锤压头幅值越小,水锤波动趋势也越缓和。研究结果为抑制管路水锤与冲击设计提供理论参考。
Aiming at severe vibration phenomenon of pipe behind the ultra-supercritical steam trap during the valve-opening process,the transient model on water hammer in the pipe was calculated by method of characteristics( MOC). Based on Matlab software,the time domain curves of flow and water hammer pressure head on fluid was obtained in different flow characteristic and different throttling effect for valve. The analyses show that adopting equal percentage flow characteristic about the valve could alleviate water hammer in the pipe. Moreover,the influences of throttling effect for steam trap on water hammer are obvious,and the more obvious the throttling effect for steam trap,the more relieving water hammer wave and the smaller water hammer pressure head peak. The results provide theoretical references for design of steam trap in preventing water hammer and anti-shock analysis of the fluid on pipeline.

关键词(KeyWords): 超(超)临界疏水阀;开启过程;水锤;特征线法;抑制
ultra-supercritical steam trap;opening process;water hammer;MOC;suppression

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基金项目(Foundation): 国家自然科学基金资助项目(51569012,51349008);; 甘肃省高等学校基本科研业务费资助项目(201402);; 兰州理工大学“优秀青年教师培养计划”资助项目(Q201002)

作者(Author): 李树勋;娄燕鹏;徐晓刚;丁强伟;
LI Shu-xun;LOU Yan-peng;XU Xiao-gang;DING Qiang-wei;Lanzhou University of Technology;Machinery Industry Pump and Special Valve Engineering Research Center;

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