不同流速下AP1000主管道淬火过程温度场的有限元模拟

doi:10.13251/j.issn.0254-6051.2020.08.028

金属热处理 ›› 2020, Vol. 45 ›› Issue (8): 147-151.DOI: 10.13251/j.issn.0254-6051.2020.08.028

不同流速下AP1000主管道淬火过程温度场的有限元模拟

刘华英¹, 彭新元², 唐龙书², 李超²

1.南昌航空大学科技学院, 江西共青城 332020;
2.南昌航空大学材料科学与工程学院, 江西南昌 330063

收稿日期:2020-02-02 出版日期:2020-08-25 发布日期:2020-09-07
作者简介:刘华英(1986—),女,讲师,硕士,主要研究方向为材料的组织与性能调控,E-mail:pxy728@126.com
基金资助:
江西省教育厅科技项目(GJJ151870)

Finite element simulation of temperature field for AP1000 main pipeline during quenching under different flow rates

Liu Huaying¹, Peng Xinyuan², Tang Longshu², Li Chao²

1. Science and Technology College, Nanchang Hangkong University, Gongqingcheng Jiangxi 332020, China;
2. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang Jiangxi 330063, China

Received:2020-02-02 Online:2020-08-25 Published:2020-09-07

摘要/Abstract

摘要： 利用ANSYS有限元软件建立了AP1000核电主管道三维有限元网格模型,根据反传热法计算了0.3、0.5、0.7和1.0 m/s四种不同水流速下316LN不锈钢的表面换热系数,对其淬火过程的温度场进行了模拟,初步探讨了西屋公司提出的180 s冷却至427 ℃以下的可能性。结果表明:水流流速由0.3 m/s提高到1.0 m/s时,316LN不锈钢的表面换热系数仅由3013 W/(m²·℃)增加至3560 W/(m²·℃)。不同流速下,主管道表面和心部温度均随淬火时间的延长而降低。1.0 m/s流速下,主管道内、外表面温度下降非常快,淬火180 s时温度已降至200 ℃以下,600 s时已冷却至室温。而主管道管壁中心(壁厚为83 mm)及接管嘴凸台中心部位温度下降较慢,淬火180 s时温度分别在580 ℃和860 ℃左右,未能满足西屋公司提出的180 s冷却至427 ℃以下的要求,淬火530 s左右主管道各部位才能都冷到427 ℃以下。

关键词: AP1000主管道, 316LN不锈钢, 有限元模拟, 淬火, 温度场

Abstract: A three-dimensional finite element model of AP1000 main pipeline was established by ANSYS finite element analysis software. The heat transfer coefficients of 316LN stainless steel at different water flow rates of 0.3, 0.5, 0.7 and 1.0 m/s were calculated according to the inverse heat conduction method. The temperature field of AP1000 nuclear power main pipeline was simulated by ANSYS. The possibility of cooling to below 427 ℃ within 180 s proposed by Westinghouse company was preliminarily discussed. The results show that when water flow rate increases from 0.3 m/s to 1.0 m/s, the surface heat transfer coefficient of 316LN stainless steel only increases from 3013 W/(m²·℃) to 3560 W/(m²·℃). At different flow rates, the temperature field of main pipeline surface and center decrease with the extension of quenching time. When the water flow rate is 1.0 m/s, the temperature of inner and outer surface of the main pipeline drops very quickly. It can be quenched to below 200 ℃ for 180 s and to room temperature for 600 s. However, the temperatures of main pipeline center (thickness is about 83 mm) and filler neck convex center decrease slowly, only reach about 580 ℃ and 860 ℃ respectively after quenching for 180 s, which failed to meet Westinghouse's requirement of cooling below 427 ℃ within 180 s. All parts of the main pipeline can be cooled to below 427 ℃ after quenching for about 530 s.

Key words: AP1000 main pipeline, 316LN stainless steel, finite element simulation, quenching, temperature field

中图分类号:

TG156.3

刘华英, 彭新元, 唐龙书, 李超. 不同流速下AP1000主管道淬火过程温度场的有限元模拟[J]. 金属热处理, 2020, 45(8): 147-151.

Liu Huaying, Peng Xinyuan, Tang Longshu, Li Chao. Finite element simulation of temperature field for AP1000 main pipeline during quenching under different flow rates[J]. Heat Treatment of Metals, 2020, 45(8): 147-151.

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不同流速下AP1000主管道淬火过程温度场的有限元模拟

Finite element simulation of temperature field for AP1000 main pipeline during quenching under different flow rates

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