Applied Mathematics and Mechanics (English Edition) ›› 2018, Vol. 39 ›› Issue (3): 423-436.doi: https://doi.org/10.1007/s10483-018-2310-9

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Performance investigation of plasma magnetohydrodynamic power generator

Hulin HUANG, Linyong LI, Guiping ZHU, Lai LI   

  1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2017-06-05 修回日期:2017-09-11 出版日期:2018-03-01 发布日期:2018-03-01
  • 通讯作者: Hulin HUANG E-mail:hlhuang@nuaa.edu.cn
  • 基金资助:
    Project supported by the National Defense Basic Scientific Research Program of China (No. JCKY2013203B003)

Performance investigation of plasma magnetohydrodynamic power generator

Hulin HUANG, Linyong LI, Guiping ZHU, Lai LI   

  1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2017-06-05 Revised:2017-09-11 Online:2018-03-01 Published:2018-03-01
  • Contact: Hulin HUANG E-mail:hlhuang@nuaa.edu.cn
  • Supported by:
    Project supported by the National Defense Basic Scientific Research Program of China (No. JCKY2013203B003)

摘要: A magnetohydrodynamic (MHD) power generator system involves several subjects such as magnetohydrodynamics, plasma physics, material science, and structure mechanics. Therefore, the performance of the MHD power generator is affected by many factors, among which the load coefficient k is of great importance. This paper reveals the effect of some system parameters on the performance by three-dimensional (3D) numerical simulation for a Faraday type MHD power generator using He/Xe as working plasma. The results show that average electrical conductivity increases first and then decreases with the addition of magnetic field intensity. Electrical conductivity reaches the maximum value of 11.05 S/m, while the applied magnetic field strength is B=1.75 T. When B > 3 T, the ionization rate along the midline well keeps stable, which indicates that the ionization rate and three-body recombination rate (three kinds of particles combining to two kinds of particles) are approximately equal, and the relatively stable plasma structure of the mainstream is preserved. Efficiency of power generation of the Faraday type channel increases with an increment of the load factor. However, enthalpy extraction first increases to a certain value, and then decreases with the load factor. The enthalpy extraction rate reaches the maximum when the load coefficient k equals 0.625, which is the best performance of the power generator channel with the maximum electricity production.

关键词: magnetohydrodynamic (MHD) power generator, Faraday type generator channel, load factor, magnetic field, large deformation, non-symmetrical, iteration method, ionization

Abstract: A magnetohydrodynamic (MHD) power generator system involves several subjects such as magnetohydrodynamics, plasma physics, material science, and structure mechanics. Therefore, the performance of the MHD power generator is affected by many factors, among which the load coefficient k is of great importance. This paper reveals the effect of some system parameters on the performance by three-dimensional (3D) numerical simulation for a Faraday type MHD power generator using He/Xe as working plasma. The results show that average electrical conductivity increases first and then decreases with the addition of magnetic field intensity. Electrical conductivity reaches the maximum value of 11.05 S/m, while the applied magnetic field strength is B=1.75 T. When B > 3 T, the ionization rate along the midline well keeps stable, which indicates that the ionization rate and three-body recombination rate (three kinds of particles combining to two kinds of particles) are approximately equal, and the relatively stable plasma structure of the mainstream is preserved. Efficiency of power generation of the Faraday type channel increases with an increment of the load factor. However, enthalpy extraction first increases to a certain value, and then decreases with the load factor. The enthalpy extraction rate reaches the maximum when the load coefficient k equals 0.625, which is the best performance of the power generator channel with the maximum electricity production.

Key words: magnetohydrodynamic (MHD) power generator, ionization, load factor, large deformation, non-symmetrical, iteration method, magnetic field, Faraday type generator channel

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