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首页> 外文期刊>Thermal engineering >Influence of Nonuniformity of the Submerged Perforated Sheet on Steam Demand Leveling on the Evaporation Surface of a WER Steam Generator
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Influence of Nonuniformity of the Submerged Perforated Sheet on Steam Demand Leveling on the Evaporation Surface of a WER Steam Generator

机译：浸入式多孔板的不均匀性对WER蒸汽发生器蒸发表面上的蒸汽需求水平的影响

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摘要

The results of a calculation and experimental research of the influence of nonuniformity of the submerged perforated sheet on steam demand leveling on the evaporation surface are published in the current article. A short description of the PGV test facility and a measuring system whose test section is a transverse "cut" of an actual PGV-1000 steam generator with the internals is presented. The methods of experimental starts are explained and instrumentations are described. A uniformly perforated sheet with the flow section of 5.7% and a nonuniformly perforated sheet with the flow section of 4.3% on the cold half and 8.1 % on the hot half were used in the experiments. The system pressure was approximately 7 MPa, the inlet steam flow rate was varied between 4.23 and 7.94 t/h, i.e., the steam velocity on the evaporation surface was 0.15-0.29 m/s. The experimental results were analyzed with the engineering method based on estimating the flow rates of steam on hot and cold half by the experimental values of the pressure drop on submerged list and the STEG code, which was developed for three-dimensional mathematical modeling of the two-phase thermo-hydraulics in the heat exchanger volume and upgraded. It was established that changing the perforation from a uniform to a nonuniform one increases the residual nonuniformity coefficient, which characterizes the flow of steam from the hot side to the cold side under the sheet. However, the steam separation becomes worse because of a high local residual nonuniformity coefficients near the border of two plates with different perforation levels.
机译：在这篇文章中发表了计算结果和实验研究结果，该结果是关于浸没式多孔板的不均匀性对蒸发表面上的蒸汽需求量的影响。简要介绍了PGV测试设备和测量系统，其测试部分是带有内部零件的实际PGV-1000蒸汽发生器的横向“切口”。说明了实验开始的方法并介绍了仪器。在实验中使用流动部分为5.7％的均匀穿孔板和流动部分为4.3％的非均匀穿孔板。系统压力约为7 MPa，入口蒸汽流速在4.23至7.94 t / h之间变化，即蒸发表面的蒸汽速度为0.15-0.29 m / s。利用工程方法对实验结果进行了分析，该方法是根据淹没列表上的压降实验值和STEG代码估算出的热和冷一半上的蒸汽流量，并针对两者进行三维数学建模而开发的相热工液压在换热器中的体积和升级程度。已经确定的是，将穿孔从均匀的穿孔改变为不均匀的穿孔会增加残余的不均匀系数，其表征了从片材下方的热侧到冷侧的蒸汽流动。然而，由于在具有不同射孔水平的两个板的边界附近具有高的局部残余不均匀系数，因此蒸汽分离变得更糟。

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  • 来源
    《Thermal engineering》 |2016年第1期|51-55|共5页
  • 作者

    V. N. Blinkov; I. V. Elkin; D. A. Emelianov; V. I. Melikhov; O. I. Melikhov; A. A. Nerovnov; S. M. Nikonov; Y. V. Parfenov;

  • 作者单位

    JSC Elektrogorsk Research and Engineering Center for NPP safety (JSC EREC), ul. Svyatogo Konstantina 6, Elektrogorsk, 142530, Russia;

    JSC Elektrogorsk Research and Engineering Center for NPP safety (JSC EREC), ul. Svyatogo Konstantina 6, Elektrogorsk, 142530, Russia;

    Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

    JSC Elektrogorsk Research and Engineering Center for NPP safety (JSC EREC), ul. Svyatogo Konstantina 6, Elektrogorsk, 142530, Russia;

    Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

    JSC Elektrogorsk Research and Engineering Center for NPP safety (JSC EREC), ul. Svyatogo Konstantina 6, Elektrogorsk, 142530, Russia;

    Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

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  • 正文语种 eng
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  • 关键词

    nonuniform perforation; two-phase flows; steam generator; submerged perforated sheet; hydraulic friction factor; bubbling; void fraction;

    机译：穿孔不均匀;两相流蒸汽发生器浸入式多孔板水力摩擦系数冒泡空隙率;

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