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 20 mm. Experiments were conducted for dc negative applied voltage ranging from 0 to 24 kV applied between a corona wire with a diameter of 0.24 mm and a grounded rod electrode. The grounded rod electrode diameter is varied from 1.5 to 3.1 mm. 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 40.1 L/min of gas flow rate is generated for a pipe diameter of 20 mm, with a grounding rod diameter electrode of 3.1 mm and corona wire to grounding rod electrode gap distant of 12.6 mm.