基于华龙一号反应堆堆顶结构通风系统的数值模拟方法及试验验证
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摘要
一体化堆顶结构对核反应堆中控制棒驱动机构(CRDM)的线圈组件通风冷却有重要作用。本文对华龙一号反应堆的一体化堆顶通风结构建立三维模型,运用ANSYS CFX模拟研究了在不同通风量下通风结构—CRDM线圈组件之间的气流速度和压降分布情况。为了验证数值模拟方法的正确性,建立1:1通风结构试验装置,在7×10~4、8×10~4、9×10~4和10×10~4m~3/h风量下进行冷态试验研究,试验结果与模拟结果吻合良好,验证了该模拟方法的正确性。考虑流体的对流传热,在控制棒驱动机构有热源的情况下模拟一体化堆顶结构的通风冷却性能。结果表明,一体化堆顶结构能很好地满足反应堆堆顶通风冷却的要求。
The integrated head structure(IHS) plays an important role in the ventilation of the control rod drive mechanism(CRDM) in nuclear reactors. In this paper, a three-dimensional model is established for the ventilation structure of IHS for HPR1000, and the ANSYS CRX simulation is used to study the airflow velocity and pressure drop distribution in different ventilation quantities. In order to verify the correctness of the simulation method, a 1:1 test device was established and cold tests are carried out under air volume of 7×10~4,8×10~4,9×10~4,10×10~4 m~3/h. The test results are in good agreement with the simulation results, and thus, the correctness of the simulation method is verified. Considering the heat transfer of the fluid, ventilation performance is simulated for the CRDM with heat sources, and the results show that IHS can satisfy the ventilation requirements.
The integrated head structure(IHS) plays an important role in the ventilation of the control rod drive mechanism(CRDM) in nuclear reactors. In this paper, a three-dimensional model is established for the ventilation structure of IHS for HPR1000, and the ANSYS CRX simulation is used to study the airflow velocity and pressure drop distribution in different ventilation quantities. In order to verify the correctness of the simulation method, a 1:1 test device was established and cold tests are carried out under air volume of 7×10~4,8×10~4,9×10~4,10×10~4 m~3/h. The test results are in good agreement with the simulation results, and thus, the correctness of the simulation method is verified. Considering the heat transfer of the fluid, ventilation performance is simulated for the CRDM with heat sources, and the results show that IHS can satisfy the ventilation requirements.
引文
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[2]何培峰,许斌,罗英. ACP100集成式堆顶结构可压缩气体对流传热数值模拟[J].核技术,2016, 39(10):100601-100607.
[3]何培峰,许斌,罗英,等.基于HyperMesh的反应堆堆顶结构高质量计算流体力学网栺生成[J].应用力学学报,2017, 34(2):281-286.
[4]于浩,张明,冯少东,等. CAP1000一体化堆顶组件风冷系统流场分析[J].核技术,2013, 36(4):040624-040628.
[5]于浩,张明,张伟,等.反应堆流场分析的数值模拟[J].计算机辅助工程,2014, 23(6):91-93.