首页> 外文OA文献 >CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors
【2h】

CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors

机译:压水堆反应堆核燃料束和隔板的CFD分析

摘要

The analysis of the turbulent flows in nuclear fuel bundles is a very interesting task to optimize the efficiency of modern nuclear power plants. The proposed study utilizes Computational Fluid Dynamics (CFD) to characterize the flow pattern generated in a fuel bundle with Spacer Grids (SG) and Mixing Vanes (MV). CFD calculations were performed using different turbulence models for steady state simulations. Large Eddy Simulations (LES) scheme was applied to time dependent cases. The simulations were compared with the experimental data measured at Texas A&M University fuel bundle experimental facility. Also, another objective is to develop some new coarse mesh approaches for modeling MV to include these structures in the prospective of quarter of core simulations; MV and SG are usually modeled with porous media, since the computational power required to solve the full geometry is still unacceptable. The new contribution of the study is the definition and implementation of a Momentum Sources Forcing approach that allows a detailed definition of MV and SG for coarse mesh calculations. The proposed method was investigated using different turbulence models and different numerical schemes. Also, LES calculations allowed the study of Fluid Structure Interaction (FSI), that generates vibration problems and failure of nuclear fuel pins. A spectral analysis of the forces acting on the fuel pins walls was developed. In conclusion, a comprehensive study of fuel bundle problem was proposed with benchmark of the computational techniques to the experimental data.
机译:分析核燃料束中的湍流是优化现代核电站效率的一项非常有趣的任务。拟议的研究利用计算流体动力学(CFD)来表征在带有间隔格(SG)和混合叶片(MV)的燃料束中产生的流型。 CFD计算使用不同的湍流模型进行稳态仿真。大涡模拟(LES)方案应用于时间相关的情况。将模拟结果与在德克萨斯农工大学燃料束实验设施中测得的实验数据进行了比较。另外,另一个目标是开发一些新的用于对MV建模的粗糙网格方法,以将这些结构包括在四分之一的核心模拟中。 MV和SG通常用多孔介质建模,因为解决整个几何形状所需的计算能力仍然不可接受。该研究的新贡献是动量源强迫方法的定义和实施,该方法允许对粗网格计算的MV和SG进行详细定义。使用不同的湍流模型和不同的数值方案研究了所提出的方法。此外,LES计算还可以研究流体结构相互作用(FSI),从而产生振动问题和核燃料销的故障。对作用在燃料销壁上的力进行了频谱分析。综上所述,以实验数据的计算技术为基准,提出了对燃料束问题的综合研究。

著录项

  • 作者

    Capone Luigi;

  • 作者单位
  • 年度 2012
  • 总页数
  • 原文格式 PDF
  • 正文语种 en_US
  • 中图分类
  • 入库时间 2022-08-20 19:41:53

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号