scholarly journals Accelerated Cavitation Damage of Steels in Liquid Metal Environments

2018 ◽  
Author(s):  
Shengqiang Ma ◽  
Jiandong Xing ◽  
Hanguang Fu ◽  
Shizhong Wei
Keyword(s):  
Liquid Metal ◽  
Cavitation Damage

Experiments and Simulations With Large Gas Bubbles in Mercury Towards Establishing a Gas Layer to Mitigate Cavitation Damage

2006 ◽  
Author(s):  
Mark Wendel ◽  
David Felde ◽  
Thomas Karnowski ◽  
Bernard Riemer ◽  
Arthur Ruggles
Keyword(s):  
Liquid Metal ◽  
Solid Wall ◽  
National Laboratory ◽  
Large Bubble ◽  
Cavitation Damage ◽  
Oak Ridge ◽  
Beam Experiment ◽  
Order Of Magnitude ◽  
Protective Gas ◽  
Gas Layer

One option that shows promise for protecting solid surfaces from cavitation damage in liquid metal spallation targets involves introducing an interstitial gas layer between the liquid metal and the containment vessel wall. Several approaches toward establishing such a protective gas layer are being investigated at the Oak Ridge National Laboratory including large bubble injection and methods that involve stabilization of the layer by surface modifications to enhance gas hold-up on the wall or by inserting a porous media. It has previously been reported that using a gas layer configuration in a test target showed an order-of-magnitude decrease in damage for an in-beam experiment. Video images that were taken of the successful gas/mercury flow configuration have been analyzed and correlated. The results show that the success was obtained under conditions where only 60% of the solid wall was covered with gas. Such a result implies that this mitigation scheme may have much more potential. Additional experiments with gas injection into water are underway. Multi-component flow simulations are also being used to provide direction for these new experiments. These simulations have been used to size the gas layer and position multiple inlet nozzles.

scholarly journals Numerical Study on the Potential of Cavitation Damage in a Lead–Bismuth Eutectic Spallation Target

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 681
Author(s):  
Tao Wan ◽  
Takashi Naoe ◽  
Hiroyuki Kogawa ◽  
Masatoshi Futakawa ◽  
Hironari Obayashi ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Proton Beam ◽  
Pulse Duration ◽  
Cavitation Bubble ◽  
Bubble Dynamics ◽  
Metal Flow ◽  
Test Facility ◽  
Cavitation Damage ◽  
Spallation Target ◽  
Liquid Metal Flow

To perform basic Research and Development for future Accelerator-driven Systems (ADSs), Japan Proton Accelerator Research Complex (J-PARC) will construct an ADS target test facility. A Lead–Bismuth Eutectic (LBE) spallation target will be installed in the target test facility and bombarded by pulsed proton beams (250 kW, 400 MeV, 25 Hz, and 0.5 ms pulse duration). To realize the LBE spallation target, cavitation damage due to pressure changes in the liquid metal should be determined, preliminarily, because such damage is considered to be very critical, from the viewpoint of target safety and lifetime. In this study, cavitation damage due to pressure waves caused by pulsed proton beam injection and turbulent liquid metal flow, were studied, numerically, from the viewpoint of single cavitation bubble dynamics. Specifically, the threshold of cavitation and effects of flow speed fluctuation on cavitation bubble dynamics, in an orifice structure, were investigated in the present work. The results showed that the LBE spallation target did not undergo cavitation damage, under normal nominal operation conditions, mainly because of the long pulse duration of the pulsed proton beam and the low liquid metal flow velocity. Nevertheless, the possibility of cavitation damage in the orifice structure, under certain extreme transient LBE flow conditions, cannot be neglected.

Linear growth of instabilities on a liquid metal under normal electric field

1993 ◽  
Vol 3 (8) ◽  
pp. 1201-1225 ◽  
Author(s):  
G. N�ron de Surgy ◽  
J.-P. Chabrerie ◽  
O. Denoux ◽  
J.-E. Wesfreid
Keyword(s):  
Liquid Metal ◽  
Electric Field ◽  
Linear Growth ◽  
Normal Electric Field

ENERGY SPREADS IN FIELD EVAPORATION AND LIQUID-METAL ION SOURCES

1984 ◽  
Vol 45 (C9) ◽  
pp. C9-179-C9-182
Author(s):  
G. L.R. Mair ◽  
T. Mulvey ◽  
R. G. Forbes
Keyword(s):  
Liquid Metal ◽  
Metal Ion ◽  
Ion Sources ◽  
Field Evaporation

A HYDRODYNAMICAL STUDY OF THE INSTABILITY OF A PLANAR LIQUID METAL ION SOURCE (SUMMARY)

1989 ◽  
Vol 50 (C8) ◽  
pp. C8-175-C8-177 ◽  
Author(s):  
N. M. MISKOVSKY ◽  
J. HE ◽  
P. H. CUTLER ◽  
M. CHUNG
Keyword(s):  
Liquid Metal ◽  
Metal Ion ◽  
Ion Source

Liquid-metal ion emitters

1983 ◽  
Vol 140 (5) ◽  
pp. 137 ◽  
Author(s):  
M.D. Gabovich
Keyword(s):  
Liquid Metal ◽  
Metal Ion
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