原子能科学技术2013，Vol.47Issue(7)：1206-1211,6.DOI:10.7538/yzk.2013.47.07.1206
对冲式止回阀局部流动特性仿真模拟
Numerical Simulation of Local Flow Characteristics of Contra-push Check Valve
王戈 1韩伟实 1孟现珂 1于明锐2
作者信息
- 1. 哈尔滨工程大学核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001
- 2. 国核科学技术研究院,北京 100029
- 折叠
摘要
Abstract
When the working condition of primary pump of pressurized water reactor (PWR) changes,water hammer phenomena appear in the loop to some extent.Severe water hammer not only would bring incident of instant over pressure and endanger the pressure boundary,but also yield the check valve failure.The contra-push check valve (CPCV) is a new kind of check valve.Its new structural design of river diversion can well reduce the water hammer phenomena,thereby enhancing the operational safety of nuclear power plant.The flow field and pressure distribution of the impact tube laryngeal and the connected cavity during the valve closing process were veritably simulated with computational fluid dynamics (CFD) simulation software FLUENT.The dynamic grid and UDF (user-defined function) technology were used in simulation.The results show that although the changes of the geometry will lead to the local flow velocity higher than that of the other part in the closing process,but the impact on the valve closing stability is very small.In addition,through the analysis of the flow field,it is found that the valve closing process can be divided into three stages,each of which shows its own independent characteristics.The study of this paper has provided a basis for future improvement of the valve structure and reliability analysis.关键词
动网格/止回阀/关闭特性Key words
dynamic grid/ check valve/ closing characteristics分类
能源科技引用本文复制引用
王戈,韩伟实,孟现珂,于明锐..对冲式止回阀局部流动特性仿真模拟[J].原子能科学技术,2013,47(7):1206-1211,6.
