基于脉动比预处理FFT的密度波不稳定性边界研究

刘洋, 杨星团, 贾海军

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
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
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
Citation: 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

基于脉动比预处理FFT的密度波不稳定性边界研究

Study of Instability Boundary of Density Wave-Based on Pulsation Ratio Pre-processing FFT Method

  • 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。

     

    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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  • 刊出日期:  2017-12-19

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