开式自然循环闪蒸不稳定的线性均相流模型
发布时间：2018-08-21 11:36
【摘要】：针对开式自然循环闪蒸不稳定边界的判定问题,本文运用状态空间方法对其进行研究,提出了描述该过程的线性均相流模型,导出了判断系统稳定性的状态空间表达式,并求解得到了闪蒸不稳定的边界。模型计算结果和实验结果符合较好,仅在高加热功率工况下存在一定偏差,而形成偏差的原因是加热段内沸腾喷发过程对闪蒸过程产生强烈的干扰,使其无法形成稳定的闪蒸流动。同时实验中通过注气诱导法排除了对闪蒸过程的影响,得到新的闪蒸不稳定边界,与模型计算得到的下边界符合很好,证明了本模型结果具有较高的准确性。
[Abstract]:In this paper, the state space method is used to study the open natural cycle flash instability boundary, a linear homogeneous flow model is proposed to describe the process, and a state space expression is derived to judge the stability of the system. The boundary of flash instability is obtained. The model results are in good agreement with the experimental results, and there is only a certain deviation under the condition of high heating power. The reason for the deviation is that the boiling eruption process in the heating section has a strong interference with the flash process. Make it impossible to form a steady flash flow. At the same time, the gas injection induction method is used to eliminate the influence on the flash process, and a new flash unstable boundary is obtained, which is in good agreement with the lower boundary calculated by the model, which proves that this model has a high accuracy.
【作者单位】： 哈尔滨工程大学核安全与仿真技术国防重点学科实验室;
【基金】：国家高科技研究发展计划项目(2012AA050906)
【分类号】：O35
[Abstract]:In this paper, the state space method is used to study the open natural cycle flash instability boundary, a linear homogeneous flow model is proposed to describe the process, and a state space expression is derived to judge the stability of the system. The boundary of flash instability is obtained. The model results are in good agreement with the experimental results, and there is only a certain deviation under the condition of high heating power. The reason for the deviation is that the boiling eruption process in the heating section has a strong interference with the flash process. Make it impossible to form a steady flash flow. At the same time, the gas injection induction method is used to eliminate the influence on the flash process, and a new flash unstable boundary is obtained, which is in good agreement with the lower boundary calculated by the model, which proves that this model has a high accuracy.
【作者单位】： 哈尔滨工程大学核安全与仿真技术国防重点学科实验室;
【基金】：国家高科技研究发展计划项目(2012AA050906)
【分类号】：O35
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