使用Ansys Fluent中用户定义的功能,在考虑辐射加热的情况下,在模型燃料元件中实现能量释放曲线

IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY
N.A. Suleimenov, N.E. Mukhamedov, O. Zhanbolatov
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引用次数: 0

摘要

本文介绍了一个在IAE RSE NNC RK分支脉冲石墨反应堆复合体上测试的实验装置模型,旨在研究反应堆中子谱从热变化到快变化的可能性。在测试准备阶段,使用MCNP进行了一系列中子物理研究。这些研究的目的是确定实验装置的模型燃料元件和非燃料结构元件在辐射加热过程中的比能量释放,同时考虑反应堆堆芯的热状态。之后,将获得的数据用作开发用户定义函数的初始条件,并进行热物理计算,以确定测试设备ANSYS Fluent软件包中的温度场分布。考虑到脉冲石墨反应堆的热状态,计算非燃料结构元件在辐射加热过程中的比能释放的方法是最近才使用的。在Ansys软件中进行热物理计算时,它需要一种特殊的方法来实现所需的能量释放曲线。本文还说明了在Ansys Fluent中使用自定义函数来定义模型燃料元件和实验装置结构元件中能量释放随时间和高度的分布的优点。此外,还介绍了用于确定燃料和非燃料结构元件中温度分布和最大值的实验装置的热物理计算结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Using a user–defined function in Ansys Fluent to implement the energy release profile in model fuel elements taking into account radiation heating
The paper presents a model of an experimental device tested on the complex of impulse graphite reactor of the Branch IAE RSE NNC RK, designed to study the possibility of changing the neutron spectrum of the reactor from thermal to fast. At the stage of preparation for testing, a series of neutron-physical studies were carried out using the MCNP. The purpose of these studies is to determine the specific energy release both in the model fuel elements and in non-fuel structural elements of the experimental device during their radiation heating, taking into account the thermal state of the reactor core. After that, the obtained data are used as initial conditions for development of user-defined functions and conducting thermophysical calculations to determine the distribution of the temperature field in the tested device, the ANSYS Fluent software package. The method for calculating the specific energy release in non-fuel structural elements during their radiation heating in the impulse graphite reactor, considering its thermal state, has been used relatively recently. It requires a special approach to the implementation of the required energy release profile when carrying out thermophysical calculations in the Ansys software. The paper also illustrates the advantages of using a custom function in Ansys Fluent to define the profile of the energy release in model fuel elements and structural elements of an experimental device depending on time and height. In addition, the results of a thermophysical calculation of the experimental device for determining the distribution and maximum values of temperature in fuel and non-fuel structural elements are presented.
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