CAJ | 학술논문

采用Fluent中的滑移网格技术模拟了球阀的转动过程，对管道中阀门突然关闭引起的水击压强进行了数值计算。计算采用标准k-ε模型并考虑了水的压缩性。通过UDF定义球阀的转动速度，分析了关阀时间和关阀方式对水击压强的影响。结果表明阀门匀速关闭时增大关阀时间对减小水击压强的作用效果在0．3 s之前较为明显；阀门关闭时间一定时，减速关阀方式能有效降低最大水击压强。
채용Fluent중적활이망격기술모의료구벌적전동과정，대관도중벌문돌연관폐인기적수격압강진행료수치계산。계산채용표준k-ε모형병고필료수적압축성。통과UDF정의구벌적전동속도，분석료관벌시간화관벌방식대수격압강적영향。결과표명벌문균속관폐시증대관벌시간대감소수격압강적작용효과재0．3 s지전교위명현；벌문관폐시간일정시，감속관벌방식능유효강저최대수격압강。
The rotation process of ball valve was simulated by using the sliding grid technology of Fluent software, and the water hammer pressure caused by the suddenly closed of the ball valve in the pipeline was calculated. In the calcula-tion, the standard turbulent model was used with considering the compressibility of water. The rotational speed of ball valve was controlled by UDF. The influence of valve’ s closure way and time on water hammer pressure were analyzed. Results show that when the valve is closed at a constant speed, the increase of closing time can reduce the water hammer pressure, and the effect is evident before 0. 3 s;when the valve closing time is fixed, the deceleration way can effective-ly reduce the water hammer pressure.