特征线几何预处理方法比较

李雪辉; 刘紫静; 谢金森; 于涛; 陈珍平; 谢芹; 曾文杰; 何丽华

doi:10.11889/j.0253-3219.2017.hjs.40.040603

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特征线几何预处理方法比较

核能科学与工程 | 更新时间：2021-05-19

- 特征线几何预处理方法比较
- Geometry preprocessing methods research of MOC
- 核技术 2017年40卷第4期文章编号：040603
- 作者机构：
  
  南华大学核科学技术学院衡阳 421001
- 作者简介：
  
  [ "李雪辉, 男, 1990年出生, 2014年毕业于南华大学, 现为硕士研究生, 研究方向为反应堆物理", "LI Xuehui, male, born in1990, graduated from University of South China in 2014, master student, focusing on reactor physics" ]
  于涛, E-mail:yutao29@sina.com YU Tao, E-mail:yutao29@sina.com
- 基金信息：
  
  国家自然科学基金(11305088);湖南省教育厅科学研究项目(16C1365)
- DOI：10.11889/j.0253-3219.2017.hjs.40.040603
  中图分类号： TL329
- 收稿日期：2016-11-30，
  
  修回日期：2017-01-24，
  
  纸质出版日期：2017-04-10
- 稿件说明：
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李雪辉, 刘紫静, 谢金森, 等. 特征线几何预处理方法比较[J]. 核技术, 2017,40(4):040603

Xuehui LI, Zijing LIU, Jinsen XIE, et al. Geometry preprocessing methods research of MOC[J]. Nuclear techniques, 2017, 40(4): 040603
李雪辉, 刘紫静, 谢金森, 等. 特征线几何预处理方法比较[J]. 核技术, 2017,40(4):040603 DOI： 10.11889/j.0253-3219.2017.hjs.40.040603.

Xuehui LI, Zijing LIU, Jinsen XIE, et al. Geometry preprocessing methods research of MOC[J]. Nuclear techniques, 2017, 40(4): 040603 DOI： 10.11889/j.0253-3219.2017.hjs.40.040603.

摘要

网格划分、特征线间距、角度求积组、极角数目和方位角大小等几何预处理过程对特征线法的计算精度和计算效率有较大影响。基于步特征线法开发输运程序，通过数值计算验证所开发程序的正确性并分析两种特征线扫描方法（首尾相间循环扫描法、首尾相接循环扫描法）以及网格划分、特征线间距、角度求积组、极角数目、方位角大小对计算精度的影响。结果表明，开发的程序准确可靠；首尾相间循环扫描方法的收敛速度比首尾相接循环扫描方法慢。

Abstract

Background

Geometry preprocessing

such as mesh division

between the characteristic line

polar angle quadrature set

the number of polar and azimuth angles and so on

has a great impact on computational accuracy and efficiency of the method of characteristics (MOC).

Purpose

This paper based on step characteristics method (SC) has developed a neutron transport calculation code.

Methods

Through numerical calculations

it has been verified the correctness of the program and has analyzed and compared two characteristic line scan method (fore and aft disconnect loop scanning method

the head-tail circulation scanning method). In addition

based on head-tail circulation scanning method

conducted a series of sensitivity analysis of the calculation accuracy about mesh division

between the characteristic line

polar angle quadrature set

the number of polar and azimuth angles.

Results

Program is accurate and reliable and the head-tail circulation scanning method has faster convergence rate than fore and aft disconnect loop scanning method.

Conclusions

Mesh division less than 2.5 cm can meet the calculation accuracy requirements and characteristic line spacing 0.1 cm and four azimuth has the highest calculation precision. More number of polar angle has higher calculation accuracy

two discrete polar angle has enough meet the accuracy requirements; the four arranged azimuth in the first quadrant should be laied out with two angles at both sides of 45·angle; Tabuchi and Yamamodo (TY) quadrature weighted have slightly higher calculation accuracy than Leonard (LO) quadrature set.

关键词

Keywords

references

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