Experimental Study on Influences of Kinematic Viscosity on Occurences of Cavitation Due to Sub-Surface Vortex
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
G1-2 - Sodium Cooled Fast Reactors Design and Safety and Lead/Lead-Bismuth Cooled Reactors

Toshiki Ezure (Japan Atomic Energy Agency)
Nobuyuki Kimura (Japan Atomic Energy Agency)
Jun Kobayashi (Japan Atomic Energy Agency)
Hideki Kamide (Japan Atomic Energy Agency)


In order to clarify the influence of kinematic viscosity (ν) on the occurrence of vortex cavitation, a water experiment was carried out in a cylindrical tank with a suction pipe.The occurrences of vortex cavitation were measured under several fluid temperature conditions between 10°C and 80°C (ν : 1.3x10-6 to 3.7x10-6m2/s).The velocity fields around vortex were also measured by Particle Image Velocimetry. The influence of ν was observed under relatively high ν conditions. However, that influence diminished with the increase of νor suction velocity. And also, normalized circulation Γ* was found as an index to estimate such influences of ν or suction velocity on the vortex cavitation.

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