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Energies 2018, 11(1), 127; https://doi.org/10.3390/en11010127

Numerical Simulations for a Partial Disk MHD Generator Performance

1
College of Power and Energy Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
2
College of Astronautics, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
*
Author to whom correspondence should be addressed.
Received: 15 November 2017 / Revised: 29 December 2017 / Accepted: 31 December 2017 / Published: 4 January 2018
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Abstract

In this paper, numerical simulations are carried out to predict the performance of a new designed configuration of the disk magnetohydrodynamic (MHD) generator, which segments the generator into dozens of parts. The behaviors and characteristics of segments are mainly investigated with number of parts at 24, 36, 60, 72, 90 adopted Large Eddy Simulation (LES). The numerical results declared that these division generators approach more stable plasma ionization and better performance than that of the conventional disk MHD generator at the same working conditions. The optimal value can be reached when the angle is 5–10 degrees (36–72 parts). Due to the division of the generator, the internal resistance is larger than that of the conventional disk channel that causes the reduction of Faraday current, hence the Lorentz force, j θ B , decreased. Therefore, the radial velocity increased and static pressure decreased. Consequently, the reduction of static pressure contributes to improvement to the plasma uniformity and ionization stability. Those features reveal that the designed configuration has the obvious advantage on raising energy conversion efficiency and power output. View Full-Text
Keywords: disk magnetohydrodynamic (MHD) generator; high temperature plasma; inert gas; energy conversion disk magnetohydrodynamic (MHD) generator; high temperature plasma; inert gas; energy conversion
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Li, L.; Huang, H.-L.; Zhu, G.-P. Numerical Simulations for a Partial Disk MHD Generator Performance. Energies 2018, 11, 127.

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