原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2014年
11期
2051-2056
,共6页
高温气冷堆堆芯%流场计算%耦合%分块迭代%全局求解
高溫氣冷堆堆芯%流場計算%耦閤%分塊迭代%全跼求解
고온기랭퇴퇴심%류장계산%우합%분괴질대%전국구해
HTGR core%flow field calculation%coupling%block iteration%global solution
高温气冷堆堆芯流场计算是高温气冷堆系统分析模拟的重要部分。原堆芯流场计算程序在采用分块迭代方法计算耦合流场时，部分工况收敛速度慢、耗时长，甚至出现不收敛问题。基于此，本文分析了分块迭代方法的收敛性，从全局求解的思路出发，并根据堆芯流场模型的特点使用直接求解法，开发了一套用于计算高温气冷堆堆芯流场的高效全局求解方法。与分块迭代方法相比，全局求解方法的收敛性和计算效率均得到很大提高。
高溫氣冷堆堆芯流場計算是高溫氣冷堆繫統分析模擬的重要部分。原堆芯流場計算程序在採用分塊迭代方法計算耦閤流場時，部分工況收斂速度慢、耗時長，甚至齣現不收斂問題。基于此，本文分析瞭分塊迭代方法的收斂性，從全跼求解的思路齣髮，併根據堆芯流場模型的特點使用直接求解法，開髮瞭一套用于計算高溫氣冷堆堆芯流場的高效全跼求解方法。與分塊迭代方法相比，全跼求解方法的收斂性和計算效率均得到很大提高。
고온기랭퇴퇴심류장계산시고온기랭퇴계통분석모의적중요부분。원퇴심류장계산정서재채용분괴질대방법계산우합류장시，부분공황수렴속도만、모시장，심지출현불수렴문제。기우차，본문분석료분괴질대방법적수렴성，종전국구해적사로출발，병근거퇴심류장모형적특점사용직접구해법，개발료일투용우계산고온기랭퇴퇴심류장적고효전국구해방법。여분괴질대방법상비，전국구해방법적수렴성화계산효솔균득도흔대제고。
The flow field calculation of high temperature gas‐cooled reactor (HTGR) core is an important part in HTGR simulation .The block iteration method was used in previous reactor core flow field simulation codes , but in some cases the convergence speed was very slow and convergence was hardly achieved .To improve this problem , the theory about convergence of block iteration method w as investigated .Based on the idea of global solution ,a highly efficient global solution method was developed for the calculation in the flow field of HTGR core .The direct solving method was employed in the new global solution method and it was based on the characteristics of the flow field model .Compared with the block iteration method ,the effect and efficiency in conver‐gence and calculation speed are significantly improved .
