Exploring mono-fractal characteristics of dynamic pressure at exit of centrifugal compressor based on EWT

This paper studies the dynamic pressure at outlet of 800 kW centrifugal compressor. It uses single-fractal method and empirical wavelet transform to analyze nonlinear characteristics compressor under different working conditions. First, it analyzes waveform when enters surge state from steady through transition process. also extract modal components waveform, which is reconstructed according correlation coefficient. Second, autocorrelation function signal numbers hysteresis points k . Finally, Hurst parameters original identify The results show that can effectively reflect Compared with signal, easier for parameter