二维任意几何特征线法长射线加速方法性能研究  

Macro-track transport acceleration performance for the method of characteristics in arbitrary 2D geometry

作　　者：郭建 朱贵凤[1] 严睿[1] 邹杨[1] GUO Jian;ZHU Guifeng;YAN Rui;ZOU Yang(Department of Reactor Physics,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学院上海应用物理研究所反应堆物理部,上海201800

出　　处：《哈尔滨工程大学学报》2024年第12期2369-2376,共8页Journal of Harbin Engineering University

基　　金：中国科学院引才计划青年项目(SINAP-YCJH-202303);上海市自然科学基金项目(24ZR1478400)。

摘　　要：为了消除规则粗网格加速方法对几何描述能力的限制,本文在长射线加速方法中引入任意低阶角度近似和低阶射线近似的基础上,利用熔盐堆、重水堆和压水堆等多个不同类型基准题对加速效果进行测试,验证长射线方法在各种类型问题的加速性能。研究表明:长射线加速方法具有很强的适应性,可实现不同燃料形式和慢化剂的基准题加速,达到约20倍的时间加速效果。获得和传统粗网有限差分方法相近的加速效果,解决了时间加速比低的问题。To overcome the geometric description limitations imposed by the coarse mesh acceleration method,arbitrary low-order angular approximations and low-order track approximations are introduced into the macro-track transport acceleration(MTTA)method.The acceleration performance of this method is tested using multiple benchmark problems from various reactor types,such as molten salt reactors,heavy water reactors,and pressurized water reactors.Results demonstrate that the MTTA method exhibits strong adaptability,effectively accelerating benchmark problems with various fuel forms and moderators,achieving an acceleration effect of approximately 20 times.This method achieves acceleration results comparable to those of traditional coarse mesh finite difference methods,solving the problem of low time acceleration ratios.

关 键 词：中子输运数值模拟 长射线加速方法 特征线法 二维任意几何 构造实体几何 低阶角度近似 低阶射线近似 基准题验证 

分 类 号：TL325[核科学技术—核技术及应用]