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首页> 外文期刊>Thermal engineering >Study into the Distribution of Mass Velocity and Enthalpy of Single-Phase and Two-Phase Flows in the Cross Section of a 19-Rod Bundle in an Electrically Heated Model of an RBMK-1000 Fuel Assembly
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Study into the Distribution of Mass Velocity and Enthalpy of Single-Phase and Two-Phase Flows in the Cross Section of a 19-Rod Bundle in an Electrically Heated Model of an RBMK-1000 Fuel Assembly

机译：在RBMK-1000燃料组件的电加热模型中，在19杆束的横截面中进行质量速度和单相和两相流量的分布

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Abstract The results of experimental studies into the distribution of mass velocity and enthalpy of single-phase and two-phase flows over the cross section of a 19-rod bundle in an electrically heated model of an RBMK-1000 fuel assembly (FA) are presented. A description is given of the experimental section, which included a 19-rod electrically heated assembly of fuel-element simulators, a system for sampling a medium from cells, and a control system for moving samplers. A bunch of fuel rod simulators consisted of a central unheated rod and 18 electrically heated rods. The heated length of the rods bundle was 3500 mm. The sampling system from characteristic cells included sharp-edge samplers, a system for moving samplers from the starting position to the working position, and a cooling system and measuring sample parameters. Samplers corresponding in shape and geometrical dimensions to five characteristic cells were made of stainless steel. Single phase and two phase samples were taken from assembly characteristic cells under the condition of isokinetics. The condition for the isokinetics of the selection was that the parameters of the coolant flow that entered the sampler remained the same as they were before the sampler was introduced into the stream. In the experiments, the achievement of the isokinetic condition was determined on the basis of the measured difference in static pressures in the cells and on the wall of the assembly housing. The results of experiments performed under isothermal and nonisothermal coolant flows in a wide range of mass velocities and enthalpies are presented. It has been shown that the distribution of the reduced mass velocity and steam quality over the bundle cells depends on the flow regimes of the coolant flow that are formed in the cells.
机译：摘要展示了在RBMK-1000燃料组件（FA）的电加热模型中，在RBMK-1000燃料组件（FA）的电加热模型中，对单相和单相的横截面分布的实验研究和单相的焓和两相流量的分布。 。给出了实验部分的描述，该实验部分包括燃料元件模拟器的19杆电加热组件，用于采样来自电池的介质的系统，以及用于移动采样器的控制系统。一堆燃料棒模拟器由中央未加热的棒和18个电加热棒组成。杆束的加热长度为3500mm。来自特征单元的采样系统包括尖锐边缘采样器，用于将采样器从起始位置移动到工作位置的系统，以及冷却系统和测量样品参数。相对应的采样器和几何尺寸至五个特征电池由不锈钢制成。单相和两相样品在等动力学条件下从组装特征细胞中取出。选择的等因速器的条件是进入采样器的冷却剂流的参数保持与它们在进入流中之前的相同。在实验中，基于电池中的静压和组装壳体的壁的测量差异确定等因内条件的实现。提出了在等温和非体液冷却剂下进行的实验结果在广泛的质量速度和焓下进行。已经表明，在束单元上的降低的质量速度和蒸汽质量的分布取决于在细胞中形成的冷却剂流的流量。

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