基于Monte Carlo方法的CFETR低温泵设计与关键参数分析  

Structure Design and Key Parameter Analysis of CFETR Cryo-Pump Based on Monte Carlo Simulation

作　　者：杨庆喜 冯绅绅 陈肇玺 干蜀毅[2] 王思慧 尉伟[3] 胡锐 陈仕琳 YANG Qingxi;FENG Shenshen;CHEN Zhaoxi;GAN Shuyi;WANG Sihui;WEI Wei;HU Rui;CHEN Shilin(Institute of Plasma Physics,Hefei Institute of Physical Science,CAS,Hefei 230031,China;School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院等离子体物理研究所,所合肥230031 [2]合肥工业大学机械工程学院,合肥230009 [3]中国科学技术大学国家同步辐射实验室,合肥230026

出　　处：《真空科学与技术学报》2021年第10期980-985,共6页Chinese Journal of Vacuum Science and Technology

基　　金：中国科学院合肥大科学中心协同创新培育基金项目(2019 HSC-CIP013)。

摘　　要：中国聚变工程实验堆—CFETR(China Fusion Engineering Experimental Reactor)的运行离不开稳定的真空环境。针对CFETR装置聚变等离子体运行环境和真空要求,设计了一种聚变堆堆芯专用的4.5 K大抽速低温泵。采用蒙特·卡罗方法研究低温泵泵送概率和低温泵连接过渡管道流导,发现内开阀门结构满足CFETR抽速要求;采用正交实验,模拟了不同百叶窗障板结构对泵送概率的影响,确定了百叶窗障板的最佳倾斜角度为45°;探究了低温板气体吸附均匀性,阵列的各层低温板吸附均匀性良好。研究方法和结果不仅为CFETR堆芯大抽速低温泵的设计提供了依据,并且为同类型大型低温泵的设计提供了有益的参考。The stability of the vacuum environment is essential for the stable operation of the China FusionEngineering Experimental Reactor(CFETR).According to the vacuum requirements and operating environment ofthe fusion plasma reaction of the CFETR device,a 4.5 K high-speed cryogenic pump for the CFETR torus was de-signed.The Monte Carlo method was used to calculate the pumping probability and pipeline conductance,and itwas found that the internally opened valve structure can obtain a larger pipeline conductance as well as a largerpumping speed.Orthogonal experiments are used to simulate the influence of different shielding baffle structures onthe pumping probability,and the best inclination angle and plate spacing of the shielding baffle were investigated.The uniformity of gas adsorption on the cryopanels was explored.The results will provide a reference for the designof the torus cryopump in CFETR and the similar large cryopumps for other application cases.

关 键 词：聚变堆 低温泵 泵送概率 蒙特·卡罗 屏蔽挡板 

分 类 号：TH36[机械工程—机械制造及自动化]