| 核二级波纹管截止阀在瞬态热冲击作用下的数值模拟 |
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| 引用本文： | 李树勋,雒相垚,吕兴,张丽芳,徐晓刚.核二级波纹管截止阀在瞬态热冲击作用下的数值模拟[J].核动力工程,2018,39(3):71-77. |
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| 作者姓名： | 李树勋 雒相垚 吕兴 张丽芳 徐晓刚 |
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| 作者单位： | 1.兰州理工大学,兰州,730050 |
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| 摘 要： | 为研究瞬态承压热冲击对核二级波纹管截止阀的结构强度和疲劳寿命的影响,基于流固耦合及热边界条件相关理论,通过Fluent和ANSYS有限元软件对核二级截止阀阀体进行热流固耦合分析,研究阀体监测点在不同时间点下温度场、热应力和疲劳寿命的变化,以及热冲击作用时间对疲劳寿命的灵敏度的影响。结果表明:瞬态承压热冲击对阀体的温度场、结构强度、疲劳寿命和敏感度影响巨大,必须消除这种影响,以此来保证核二级波纹管截止阀的高安全性和高可靠性。
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| 关 键 词： | 核二级波纹管截止阀 瞬态热冲击 热流固耦合 疲劳寿命 安全系数 灵敏度 |
| 收稿时间： | 2017-05-31 |
Numerical Simulation of Nuclear Secondary Bellows Globe Valve under Transient Thermal Shock |
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| Affiliation: | 1.Lanzhou University of Technology, Lanzhou,730050, China2. Machinery Industry Pump and Special Valve Engineering Research Center, Lanzhou, 730050,China |
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| Abstract: | Abstract: In order to study the effect of the transient thermal shock on the structural strength and fatigue life of the nuclear secondary bellows globe valve, the hot-fluid-solid coupling analysis of the nuclear secondary globe valve body was carried out by Fluent and ANSYS software, based on the theory of fluid-solid coupling and thermal boundary condition. The effects of the temperature field, thermal stress and fatigue life of the monitoring point at different time points and the effect of the thermal shock time on the fatigue life of the degree of sensitivity were studied. The results showed that the effects of the transient pressure on the temperature field, structural strength, fatigue life and sensitivity of the valve body was huge, and have to be eliminated to ensure the high safety of the nuclear secondary bellows globe valve. |
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