| 基于脉动比预处理FFT的密度波不稳定性边界研究 |
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| 引用本文： | 刘洋,杨星团,贾海军. 基于脉动比预处理FFT的密度波不稳定性边界研究[J]. 原子能科学技术, 2017, 51(12): 2154-2159. DOI: 10.7538/yzk.2017.51.12.2154 |
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| 作者姓名： | 刘洋 杨星团 贾海军 |
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| 作者单位： | 清华大学 核能与新能源技术研究院，先进核能技术协同创新中心，先进反应堆工程与安全教育部重点实验室，北京100084 |
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| 摘 要： | 两相流不稳定性试验的数据会包含一定程度的噪声信号。在判断两相流不稳定边界时,传统的基于流量脉动量幅值的方法具有局限性。本文研究了一种基于脉动比预处理的快速傅里叶变换(FFT)方法,通过捕捉密度波不稳定发生时频域上的特征信号来确定稳定边界,并对两组不同工况的试验数据进行分析。试验结果表明,本文方法具有较好的准确性。
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| 关 键 词： | 两相流 密度波 不稳定性 傅里叶变换 |
Study of Instability Boundary of Density Wave-Based on Pulsation Ratio Pre-processing FFT Method |
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| LIU Yang,YANG Xing-tuan,JIA Hai-jun. Study of Instability Boundary of Density Wave-Based on Pulsation Ratio Pre-processing FFT Method[J]. Atomic Energy Science and Technology, 2017, 51(12): 2154-2159. DOI: 10.7538/yzk.2017.51.12.2154 |
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| Authors: | LIU Yang YANG Xing-tuan JIA Hai-jun |
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| Affiliation: | Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, China |
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| Abstract: | The test data of the two phase flow instability contain some noise signal. When judging the unstable boundary of two-phase flow, the traditional method based on flow fluctuation amplitude has some limitations. In this paper, a method of FFT (fast Fourier transformation) based on pulsating was studied. The stable boundary was determined by capturing the characteristic signal on the frequency domain when the density wave instability occurred. The two sets of test data with different working conditions were analyzed. The results show that the present method has good accuracy. |
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| Keywords: | two-phase flow density wave instability Fourier transformation |
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