A novel geometry for a corona wind electrohydrodynamic pump

We report the flow velocity of a new electrohydrodynamic (EHD) pump configuration fabricated using a 3-D printer. It consisted of an inner conical electrode with an apex angle of 43.6 degrees and an outer conical structure with apex angles of 43.6 degrees, 63.6 degrees, 83.5 degrees, 103.5 degrees, and 180 degrees that were mounted over the inner electrode. A maximum airflow velocity of 2 m/s was measured at 8000 V/cm in the pump with the 103.5 degrees cone. In all the pumps, the velocity peaked and then dropped as the electric field reached the air´s breakdown field. In these pumps, the field gradient accelerates the charged air molecules that drag the neutrons. That charged the air molecules in the inlet side of the pump which improved the efficiency.