流体机械

2021, v.49;No.586(04) 28-34+71

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核阀流体动力学及流固耦合特性数值模拟
Numerical simulation of fluid dynamics and fluid-structure interaction characteristics in nuclear valve

冷冰;赵晶;
LENG Bing;ZHAO Jing;School of Mechanical Engineering,Shenyang University of Technology;

摘要(Abstract):

以研究高压核电闸阀内流场特性及流固耦合问题为目的,分别建立了稳态、瞬态流体动力学模型和流固耦合作用下的结构动力学模型。通过分析模拟过程中流体的压力和速度分布可知,在稳态和瞬态流动状态下,流体在流经阀体中腔部位时均会产生压力波动,并在底部形成涡流。在流固耦合作用下闸阀的静力学结构变形和应力分布满足刚度和强度要求。然而,在流固耦合作用下,闸阀的动力学结构变形和应力较大,并在阀体与导轨部位产生局部应力集中。可通过加大应力集中部位的圆角以减小应力集中的程度。
In order to study the flow field characteristics and fluid-structure interaction of the high pressure nuclear power gate valve,steady-state,transient fluid dynamics models and structural dynamic models under the action of fluid structure interaction were established,respectively.Through the analysis of the pressure and velocity distribution of the fluid in the simulation process,it can be known that in the steady-state and transient flow state,the fluid will produce pressure fluctuation when it flows through the cavity of the valve body,and forms eddies at the bottom.The static structural deformation and stress distribution of the gate valve meet the requirements of stiffness and strength under the fluid-structure interaction.However,under the action of fluid-structure interaction,the dynamic structural deformation and stress of the gate valve are larger,and local stress concentration occurs at the valve body and guide rail.The degree of stress concentration can be reduced by increasing the fillet of stress concentration part.

关键词(KeyWords): 闸阀;高压;流固耦合;应力集中
gate valve;high pressure;fluid-structure interaction;stress concentration

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基金项目(Foundation): 沈阳市重大工业专项(2019JH1/10100024)

作者(Author): 冷冰;赵晶;
LENG Bing;ZHAO Jing;School of Mechanical Engineering,Shenyang University of Technology;

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