A statistical approach to the analysis of the surge phenomenon
A statistical approach to the analysis of the surge phenomenon
复制标题
DOI：
10.1016/j.energy.2017.02.026
复制
发表时间：
2017-04
期刊：
影响因子：
9
通讯作者：
R. Bontempo;M. Cardone;M. Manna;Giovanni Vorraro
中科院分区：
文献类型：
--
作者：
R. Bontempo;M. Cardone;M. Manna;Giovanni Vorraro
本文提出了一种新颖的数据处理方法，用于分析压缩机内的喘振现象。由于喘振周期的动态特性不具有确定性，因此只能通过统计方法对其进行适当的描述。为此，通过相位平均分解技术对压力和质量流量信号的时间分辨轨迹进行处理。此外，通过引入上述信号的联合概率密度函数来检测和量化振荡喘振周期的形状，这些信号在压比-质量流量平面上被报告。与传统的确定性方法相比，这种概率方法具有两个显著的优点，即可以在统计意义上量化所有单个不稳定状态的停留时间，以及可以对这种不稳定现象进行适当的代码对实验或实验对实验的比较。然而，该方法既适用于离心式或轴流压气机的数值喘振数据，也适用于实验数据。
The paper presents an innovative data processing methodology for the analysis of the surge phenomenon occurring in a compressor. Since the dynamic of the surge cycle does not have a deterministic character, its proper description can only be obtained through a statistical approach. To this aim, the temporally resolved traces of the pressure and mass flow rate signals are processed through a phase averaged decomposition technique. Furthermore, the shape of the oscillating surge cycle is detected and quantified by introducing the joint probability density function of the aforementioned signals which are reported in the pressure ratio versus mass flow rate plane. This probabilistic approach offers two significant advantages over the conventional deterministic approach, namely the possibility to quantify the time of residence of all individual unstable states in a statistical sense, as well as the possibility to carry out a proper code-to-experiments or experiments-to-experiments comparison of such an unstable phenomenon.In this paper, the proposed statistical approach is used to process the experimental data related to the surge phenomenon occurring in a small-sized free spool centrifugal compressor for automotive applications. However, the methodology can be applied both to numerical and experimental surge data from either centrifugal or axial compressors.