Flow characteristics of wire-rod type electrohydrodynamic gas pump under negative corona operations

The electrohydrodynamic (EHD) flow characteristics for a wire to rod type EHD gas pump have been experimentally investigated for pipe diameter sizes of 6.5, 10, and 20mm. Experiments were conducted for dc negative applied voltage ranging from 0 to 24kV applied between a corona wire with a diameter of 0.24mm and a grounded rod electrode. The grounded rod electrode diameter is varied from 1.5 to 3.1mm. The wire/rod electrode distance to pipe diameter ratio is varied from 0.63 to 1.16. The results show that gas flow rate increases with increasing EHD number or discharge current. A maximum of 40.1L/min of gas flow rate is generated for a pipe diameter of 20mm, with a grounding rod diameter electrode of 3.1mm and corona wire to grounding rod electrode gap distant of 12.6mm.