流型及水动力效应计算在核电厂热交换器和反应堆配水集箱系统改造中的应用

V. Delnov
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引用次数: 0

摘要

本文论述了流型和水动力效应在核电厂热交换器和反应堆配电集箱系统(DHS)改造中的应用。是考虑四种典型的轴对称国土安全部的平面和圆柱类型,不同的流体供应收集器及其去除的方法。给出了集热器中央进口和侧向进口两种不同的圆柱形DHS设计的流型示意图。此外,还给出了具有集热器中央和侧向流体入口的各种平面型DHS设计的流动路径的水流型。分析了流体在高压高压下的流体力学特性。结果表明,在受限和自由的DHS中,冷却剂的流动具有喷射性质。封头内流体流动的特点是某些类型的射流转化为另一些类型的射流,存在涡动区和停滞区。介绍了核电站热交换器和反应堆在考虑了典型DHS特性后的设计。演示了使用所指示的模式和效果升级的DHS设计。分析了轴向对称反流双管流道出口液体分布的规律,以及轴对称反流双管的流体力学特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
APPLICATION OF FLOW PATTERNS AND ACCOUNTING OF HYDRODYNAMIC EFFECTS IN THE COURSE OF UPGRADING DISTRIBUTION HEADER SYSTEMS OF NPP HEAT EXCHANGERS AND REACTORS
The article deals with application of flow patterns and hydrodynamic effects in the course of upgrading distribution header systems (DHS) used in heat exchangers and reactors of nuclear power plants (NPP). Consideration is given to four typical axisymmetric DHSs of flat and cylindrical types, which differ in the ways of fluid supply to the collector and its removal from it. The schematic diagrams of flow patterns are shown for different DHS designs of the cylindrical types with central and lateral fluid inlets of the collector. Besides, the water flow pattern is given for the flow path of various DHS designs of a flat type, also with central and lateral fluid inlets of the collector. Hydrodynamic features of the fluid flow in the DHS have been analyzed. It is shown that in a restricted and free DHS the coolant flow is of a jet nature. The fluid flow in the header is characterized by transformation of some types of jets into others, by the presence of eddy and stagnant zones. The designs of heat exchangers and reactors for nuclear power plants with the considered typical DHS characteristics implemented are presented. The DHS designs upgraded with the use of the indicated patterns and effects are demonstrated. The revealed regularity of liquid distribution at the outlet of the DHS flow paths and the hydrodynamics identity property for axially symmetric DHS with flow reversal are analyzed.
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