Studies on magnetohydrodynamic flow characteristics and heat transfer of liquid metal two-phase flow cooling systems for a magnetically confined fusion reactor

The heat and flow characteristics of mist/steam two-phase flow in U-shaped internal cooling passage of gas turbine blade are studid numerically in this paper. The standard k-ε model was used as the turbulence model combined with the DPM model to calculate the influence of mist/steam mass ratio and mist diameter on flow and heat transfer of U-passage with different shaped ribs. The result indicates that under the same working condition, the U-shaped channel with 45 deg. V-shaped ribs has better heat transfer performance than other channels and heat transfer non-uniformity of the U-shaped channel with 75 deg. ribs is the worst among all channels studied in this paper. The heat transfer performance of the U-shaped channel with V-shaped ribs is higher than that of the channel with paralleled ribs. As for the mist/steam cooling in U-shaped passage with same ribs structure, heat transfer non-uniformity increases with the increasing of heat transfer performance. When mists diameter increases from 5μm to 15μm, the heat transfer performance of the Second-Flow-Passage increases obviously and the heat transfer non-uniformity increases at the same time. The heat transfer performance has not been further enhanced when the mists diameter continuously increases after mist diameter are larger than 10μm.

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Numerical analysis of two-phase flow and heat transfer of fuel particles and liquid metal for waste transmutation blanket

2013 IEEE 25th Symposium on Fusion Engineering (SOFE) ◽

10.1109/sofe.2013.6635315 ◽

2013 ◽

Author(s):

Wang Weihua ◽

Liu Guangmeng ◽

Huang Shenghong ◽

Yang Bin ◽

Yang Jinhong ◽

...

Keyword(s):

Heat Transfer ◽

Numerical Analysis ◽

Liquid Metal ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Flow And Heat Transfer ◽

Fuel Particles

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Numerical Analysis of Two-Phase Flow in Gas-Stirred Reactors

Proceedings of the Institution of Mechanical Engineers Part C Mechanical Engineering Science ◽

10.1243/pime_proc_1990_204_111_02 ◽

1990 ◽

Vol 204 (5) ◽

pp. 311-319

Author(s):

Y M Ferng ◽

C C Chieng ◽

C Pan

Keyword(s):

Experimental Data ◽

Liquid Metal ◽

Two Phase Flow ◽

Gas Injection ◽

Three Dimensional ◽

Flow Characteristics ◽

Water Model ◽

Phase Flow ◽

Two Phase ◽

Stirred Reactors

Using the multi-dimensional, turbulent, two-phase flow model, the fluid flow phenomena for gas injecting through a submerged lance in gas-stirred reactors are investigated numerically by a finite difference algorithm. The present numerical model is validated by comparison with the experimental data of the water model and extended to predict the flow fields and mixing phenomena inside the liquid metal model. This study indicates that the flow characteristics and mixing behaviour of the water model are similar to the metal model and the experimental data of the water model can be an important reference for the design of liquid metal reactors. The investigations consist of central (two-dimensional) and off-centred gas injection (three-dimensional) with full—and fractional—depth of lance submergence and with different gas injection rates.

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