摘要
采用ANSYS CFX数值模拟方法对安全阀开启的瞬态过程的流动机理进行了研究,通过路径分析法和流线分析法讨论了泄放口及泄放流道中流场参数的变化。研究发现在稳定排放阶段,安全阀喉部并非像以前的研究者预测的那样处于超音速状态。同时发现,安全阀密封面外侧和反冲盘出口流道局部处于超音速流态。这说明传统喷管理论并不完全适用于安全阀开启过程的描述。利用所开发的实验装置对开启过程进行的测试表明,三维模拟和实验数据非常吻合,为进一步研究安全阀超压开启机理奠定了坚实的基础。
Abstract： The transient opening mechanism of safety valves was analyzed using the method of ANSYS CFX numerical simulation. With the help of path and flowing line analytical methods, the flow field parameter variations in the discharge port and flow passage were discussed, and the changing of related parameters in the typical path were compared. It was found that in the stable discharge stage, the throat of the safety valve is not in the supersonic flow regime as predicted by many researchers. Meanwhile, the results show that the supersonic flow is happened at the outer part of the sealing surface and the outlet near the recoil disk passage. The results indicate that the traditional nozzle theory is not suitable for describing the safety valve opening mechanism. Finally experimental devices for verification were developed to test the safety valve opening process and 3D simulations studied are consistent with the experimental data. These results can be used as pre-investigation for further research on the mechanism of safety valve dynamics.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第2期376-383,共8页
Journal of Chemical Engineering of Chinese Universities
关键词
安全阀
数值模拟
路径分析
超音速
safety valve
numericalthe mechanism of safety valve dynamicssimulation
path analysis method
supersonic
