| 加热通道内超临界流动的稳定性分析——时域分析 |
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| 引用本文： | 侯东,刘鹏飞,林萌,杨燕华.加热通道内超临界流动的稳定性分析——时域分析[J].上海交通大学学报,2012,46(4):524-529. |
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| 作者姓名： | 侯东 刘鹏飞 林萌 杨燕华 |
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| 作者单位： | （上海交通大学 机械与动力工程学院， 上海 200240） |
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| 基金项目： | 国家重点基础研究发展规划(973)项目(2007CB209806) |
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| 摘 要： | 详细描述了超临界流体流动稳定性分析的时域法模型.利用该模型针对加热通道内超临界水的流动进行了瞬态模拟分析，并给出了系统质量流率随时间变化和系统进出口质量流率在相平面中的运动轨迹曲线.考察了在采用频域法得到的对数衰减率（LDR）接近0时的系统稳定性特征，得出了系统在该状态下处于极限环稳定状态的结论.通过阶跃变加热功率的瞬态模拟，证明了系统在高焓值情况下稳定性振荡现象的存在.通过时域法计算得到的结论与频域法是一致的，但时域法能更好地进行流动稳定性的非线性特性分析.
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| 关 键 词： | 时域法 流动稳定性 超临界 |
| 收稿时间： | 2011-04-04 |
The Flow Stability Analysis of Supercritical Fluid in Heated Pipes:Frequency Domain Analysis |
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| HOU Dong,LIU Peng-fei,LIN Meng,YANG Yan-hua.The Flow Stability Analysis of Supercritical Fluid in Heated Pipes:Frequency Domain Analysis[J].Journal of Shanghai Jiaotong University,2012,46(4):524-529. |
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| Authors: | HOU Dong LIU Peng-fei LIN Meng YANG Yan-hua |
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| Institution: | (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | The frequency domain model for stability analysis of flow dynamics with supercritical fluid was described. With the model the density wave oscillation of supercritical water flowing in heated pipes was studied, and the stability maps were constructed. The sensitivity studies of system inlet and outlet orifice coefficients, system pressure drop, etc., were carried out. The results show that larger inlet orifice coefficients can improve the system stability, but larger outlet orifice coefficients can degrade the system stability. Increasing the system pressure drop can also be beneficial to the system stability.
Key words： frequency domain model; flow stability; supercritical |
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| Keywords: | time domain model flow stability supercritical |
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