Flow-Induced NVH Analysis

  • Noise and Vibration Problem in a Dynamic Valve
    • Physical problem (noise and vibration occurs when the liquid-gas flow involved)

DynamicValve.jpg

  • Geometry simplification and meshing

Geometry.jpg

  • Comparison of flow signal and noise signal

1.jpg

Hilbert-Huang Transform result of pressure signal

Noisesignal.jpg

Spectral analysis result of noise signal