基于浸入实体法的氮气式水击泄压阀动态仿真

发布时间：2019-05-19 20:04

【摘要】：以氮气式水击泄压阀阀内流道流场为研究对象,运用浸入实体法模拟氮气式水击泄压阀启闭过程,建立流体域及浸入实体域三维几何模型,结合阀芯运动轨迹,建立阀芯动力学方程,针对阀芯锥面不等面积的特殊设计,分析了泄压阀在水击脉动压力作用下启闭过程中阀芯各个端面上的受力状态,同时对比分析了泄压阀在不同入口恒压和水击脉动压力作用下阀芯各个端面受力及泄放量大小的影响规律。结果表明,阀芯在启闭过程中是一个震荡过程,存在一定的不平衡受力,阀芯各端面受力不均匀,且都发生方向相反、不同幅度的震荡,阀芯圆柱面受力可忽略。
[Abstract]:Taking the flow field in the flow channel of the nitrogen gas water hammer relief valve as the research object, the opening and closing process of the nitrogen gas water hammer relief valve is simulated by the immersion method, and the three dimensional geometric models of the fluid domain and the immersion solid domain are established, combined with the movement track of the valve core. The dynamic equation of the valve core is established. According to the special design of the conical area of the valve core, the stress state of each end face of the valve core during the opening and closing of the valve core under the action of water hammer fluctuating pressure is analyzed. At the same time, the influence of the pressure relief valve on the force and discharge of each end face of the valve core under the action of different inlet constant pressure and water hammer fluctuating pressure is compared and analyzed. The results show that the valve core is a concussion process in the process of opening and closing, and there is a certain unbalanced force, the force on each end face of the valve core is uneven, and all of them occur in the opposite direction. the force on the cylindrical surface of the valve core can be ignored with different amplitude concussion.
【作者单位】：兰州理工大学石油化工学院;机械工业泵及特殊阀门工程研究中心;
【基金】：国家自然科学基金资助项目(No.51569012) 中国石油天然气股份公司重大科技专项(No.2012E-2802)
【分类号】：TE97

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