多层环形流道阻塞事故三维数值分析初步探索

发布时间：2018-05-05 05:19

  本文选题：流道阻塞 + 多层环形流道　； 参考：《核动力工程》2016年01期

【摘要】：由环形燃料板组成的多层环形燃料组件容易发生流道阻塞事故,对流道阻塞情况下的流动与换热特性进行研究非常有必要。本文对多层环形流道阻塞事故在进行三维数值分析研究中的基础问题进行探讨,验证尺度化壁面函数在流量持续降低工况下的适用性。对流道入口发生90%堵塞的工况,分别运用速度入口与压力入口的边界条件进行计算,证明压力入口是流道阻塞事故计算流体动力学(CFD)研究保守、可信的边界条件。对堵塞工况进行瞬态与稳态计算,分析流量与功率的再分配。
[Abstract]:The multi-layer annular fuel assembly composed of annular fuel plates is prone to flow channel blockage, so it is necessary to study the flow and heat transfer characteristics in the case of channel blockage. In this paper, the basic problem of multi-layer annular channel blocking accident in three-dimensional numerical analysis is discussed, and the applicability of scaling wall function under the condition of continuous flow reduction is verified. In the case of 90% blockage at the inlet of the channel, the boundary conditions of the velocity inlet and the pressure inlet are calculated, respectively. It is proved that the pressure inlet is a conservative and reliable boundary condition studied by CFD. The transient and steady state calculation of the blockage condition is carried out, and the redistribution of flow and power is analyzed.
【作者单位】： 中国科学技术大学核科学技术学院;
【基金】：中国核动力研究设计院核反应堆系统设计技术重点实验室基金项目(HT-CENT-02-2014001)
【分类号】：TL364.4
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本文编号：1846382