Design of an electrostatic lunar dust repeller for mitigating dust deposition and evaluation of its removal efficiency

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[1] Afshar-Mohajer, Nima
[2] Wu, Chang-Yu
[3] Moore, Robert
[4] Sorloaica-Hickman, Nicoleta
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Wu, C.-Y. (cywu@ufl.edu) | 1600年 / Elsevier Ltd卷 / 69期
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The dusty environment of the moon and the deposition of charged particles were troublesome in previous NASA explorations. In this study; an electrostatic lunar dust repeller (ELDR) was developed to mitigate the dust deposition problem. The ELDR consists of an arrangement of thin; needle-shaped electrodes in front of the protected surface to repel approaching; like-charged lunar dust. A discrete element method (DEM) was applied to track particle trajectories for determining the removal efficiency. Simulation results for single electrodes (L=5. cm; D=1. mm and L=10. cm; D=1. mm) both protecting a 5-cm×5-cm surface indicated that 4. kV and 1.5. kV were the respective-applied voltages required to achieve 100% protection from falling 20-μm lunar dust particles. The electrical particle-particle interaction was identified to be a beneficial factor. Finite element analysis concluded that an x-shaped pattern was the most effective arrangement of the ensemble electrodes to protect a 30-cm×30-cm surface. Modeling results showed that 2.2. kV and 1.4. kV were the minimum voltages applied to electrodes of length L=5 and 10. cm; respectively; on each electrode of the ensemble model to achieve complete removal of 20-μm-sized particles. The ensemble-electrode ELDR required lower applied voltage than the single-electrode ELDR; and in the most conservative scenario; it consumed only 9 times more electric power to protect an area 36 times larger. © 2013 Elsevier Ltd;
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