Abstract
To address the problem of low flux density generated by superconducting magnets and the onerous cooling system in existing superconducting magneto-hydrodynamic (MHD) thrusters, which leads to overall low thrust efficiency of MHD thrusters, a capacitive deionization based conductivity enhancement system is designed, and the performance of the conductivity enhancement system is quantitatively analyzed to provide a new technical direction for the conductivity control of the spiral channel. In addition, the relationship between the performance index of the thruster and the conductivity was investigated. The results showed that the conductivity, electromagnetic force, thruster, and electromagnetic efficiency were increased by 54%, 54.5%, 56.8%, and 19%, respectively, when the ion concentration in the spiral channel reached 1.38 mol L−1 during the ion release phase of the porous electrode. The adsorption concentration of the porous electrode increased with increasing loading voltage and porous electrode thickness and decreased with increasing inlet velocity.
Highlights
Magneto-fluid propulsion technology is a completely new type of marine platform propulsion, which requires almost no mechanical drive components and does not cause cavitation
MHD thrusters use Lorentz forces to accelerate conductive fluid, which are the basis of all electromagnetic propulsion systems.[4,5]
In August 1999, Chinese and Japanese researchers carried out experiments under a high field strength of 14 T
Summary
Magneto-fluid propulsion technology is a completely new type of marine platform propulsion, which requires almost no mechanical drive components and does not cause cavitation. It has great potential in noise reduction and acceleration. MHD thrusters use Lorentz forces to accelerate conductive fluid, which are the basis of all electromagnetic propulsion systems.[4,5] With the advancement of practicability, MHD thrusters have many problems that need to be solved urgently: (1) superconducting MHD advances inefficiently and lags behind practicality, making it economically unacceptable. In August 1999, Chinese and Japanese researchers carried out experiments under a high field strength of 14 T. The highest electromagnetic efficiency was 23%, and the peak efficiency of the propeller was 13.5%.7 (2) Problems derived from low electromagnetic efficiency are (1) electrolytic bubbles caused by increasing electrode voltage and (2) the increase in superconducting magnetic field strength and the magnetic field leakage caused by this increase
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