Journal of Shandong University(Engineering Science) ›› 2019, Vol. 49 ›› Issue (1): 101-106.doi: 10.6040/j.issn.1672-3961.0.2018.417

• Mechanical Engineering • Previous Articles     Next Articles

Numerical simulation on kinetics characteristics of liquid metal MHD generator

Yulei ZHANG(),Yong WANG*(),Yudong XIE,Guang SUN,Yanyun WANG,Jiazhen HAN   

  1. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China
  • Received:2018-09-25 Online:2019-02-01 Published:2019-03-01
  • Contact: Yong WANG E-mail:1184746557@qq.com;meywang@sdu.edu.cn
  • Supported by:
    国家自然科学基金资助项目(51875316)

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Abstract:

In order to get the flowing law in a liquid metal magnetohydrodynamics(MHD) generator channel, three-dimensional numerical studies on kinetics characteristics of open circuit generators were carried out. A magnetic induction method and a modified K-ε turbulence model based on Fluent were adopted to ensure the calculation precision. A comparative analysis of the velocity and force distribution of near-wall and core was made. The velocity fluctuation was defined and different physical parameters were chosen. The velocity profiles and fluctuations downstream of the effective section were analyzed quantitatively. The results showed that, the velocity fluctuations reached maximum at downstream of the effective section and channel parameters had a significant impact on velocity profiles. The channel width being kept constant, the interaction parameter determined the velocity fluctuation and the velocity fluctuation was proportional to the interaction parameter. As channel width increased, the impact of interaction parameters on velocity fluctuations declined.

Key words: liquid metal magnetohydrodynamics, kinetics characteristic, numerical simulation, velocity fluctuation, interaction parameter

CLC Number: 

  • TH113.2

Fig.1

Physical model of the LMMHD generator channel"

Table 1

Properties of Galinstan"

材料 ρ/(kg·m-3) μ/(Pa·s) σ/(S·m-1)
镓铟锡合金 6.44×103 0.24×10-2 2.24×106

Fig.2

Velocity profiles in Case Kobayashi"

Fig.3

Velocity distribution of near-wall and core"

Fig.4

Lorentz force distribution of near-wall and core"

Fig.5

Three-dimensional velocity profile"

Fig.6

Velocity profiles in different magnetic fields"

Fig.7

Variation of fluctuation with inlet velocity"

Fig.8

Variation of fluctuation with channel width"

Table 2

Key data with the same interaction parameter"

序号 U/
(m·s-1)		 B0/T vmax/
(m·s-1)		 vmin/
(m·s-1)		 k
1 0.16 0.4 0.31 0.07 3.126
2 0.25 0.5 0.48 0.12 3.146
3 0.36 0.6 0.70 0.17 3.159
4 0.64 0.8 1.25 0.30 3.170
5 1.00 1.0 1.96 0.47 3.173

Table 3

Correlation coefficient between fluctuation and interaction parameter"

通道宽度L/m 皮尔森相关系数r
0.05 0.999
0.10 0.993
0.20 0.990
0.50 0.981

Fig.9

Variation of fluctuation with interaction parameter for different channel width"

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