Fig.1

Test facility schematic

Fig.2

3D model of test inducer

Fig.3

Photograph of visualization test section

Fig.4

Cavitation performance curves at different flow coefficients

Fig.5

Cavitation development under different inlet conditions

Fig.6

Cavitation performance curves at different IGVF （Φ=0.083）

Fig.7

Cavitation performance curves at different IGVF （Φ=0.071）

Fig.8

Cavitation performance curves at different IGVF （Φ=0.059）

Fig.9

Curves of normalized critical head breakdown cavitation number with IGVF at different flow coefficients

Fig.10

Cavitation development under different IGVF （Φ=0.083）

Fig.11

Periodic backflow vortex cavitation structure （Φ=0.083， σ=0.056， IGVF=0）

Fig.12

Power density spectrum of inlet acoustic signal at different cavitation numbers （Φ=0.083，IGVF=0）

Fig.13

Periodic evolution of backflow vortex structure （Φ=0.083， σ=0.090， IGVF=0）

Fig.14

Power density spectrum of inlet pulsating pressure （Φ=0.083，σ=0.090， IGVF=0）

Fig.15

Raw inlet pulsating pressure signal （Φ=0.083，σ=0.090， IGVF=0）

Fig.16

Backflow vortex cavitation structure in inducer with inlet non-condensable gas injection （Φ=0.083， σ=0.46， IGVF=3%）

Fig.17

Power spectrum of inlet pulsating pressure at different IGVF （Φ=0.083， σ=0.090）

Fig.18

Power spectrum of inlet pulsating pressure at different IGVF （Φ=0.071， σ=0.068）

Fig.19

Raw inlet pulsating pressure signal （Φ=0.083， σ=0.090）

Fig.20

Quasi-steady characteristics of partial cavity on two-dimensional cascade［36］