超(超)临界疏水阀开启过程管道水锤抑制研究

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。

Study on Water Hammer Suppression of Pipeline in Opening Process of Ultra-supercritical Steam Trap

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.