高加疏水调节阀瞬态热应力研究  

Research on Transient Thermal Stress of HP Heater Regulated Drain Valve

作　　者：龚胜泉 刘春玲 张含 李连翠 王周杰 Gong Shengquan;Liu Chunling;Zhang Han;Li Liancui;Wang Zhoujie(Shanghai Power Equipment Research Institute Company Limited,Shanghai 200240,China)

机构地区：[1]上海发电设备成套设计研究院有限责任公司

出　　处：《流体机械》2019年第9期21-26,共6页Fluid Machinery

摘　　要：为研究由高温介质引起的热冲击对高加疏水调节阀温度分布及强度的影响,基于传热基本理论和有限元方法,利用ANSYS软件对调节阀进行了0~7 200 s内瞬态及稳态的仿真模拟,得到了温度场及应力场随时间的变化规律。结果表明,高温介质流入阀内,温度场及应力场需一定时间才能达到平衡;瞬态初期,由于热冲击作用,调节阀局部应力瞬时偏高,瞬态后期,热冲击作用减小,由介质压力引起的应力降低且趋于稳定,热冲击的影响不可忽略;瞬态计算结果与稳态计算结果相一致,为高温高压阀门的设计及仿真模拟提供了有效参考。In order to study the effect of the thermal shock caused by the high temperature medium on the temperature distribution and structural strength of the HP heater regulated drain valve,the simulations of 0~7 200 s transient-state and steady-state temperature and stress field were carried out on the regulated drain valve using ANSYS software based on the basic theory of heat transfer and finite element method,and the change law of the temperature and stress field with time was obtained.The results show that the temperature and stress field need to take a period of time to achieve equilibrium after high temperature medium inflow;Due to the influence of thermal shock,the local stress of the regulated valve is instantaneously high at initial stage,at the later stage,due to the decreased influence of thermal shock,the stress caused by the medium pressure decreases and tends to be stable,the influence of the thermal shock should not be neglected;the transient analysis result is consistent with the steady-state analysis results.The present research provides an effective reference for the design and simulation of the high temperature and high pressure valve.

关 键 词：调节阀 温度场 瞬态热应力 热冲击 

分 类 号：TH134[机械工程—机械制造及自动化]