Counter flow atomizer: Effect of the area ratio of the outlet orifice and the inlet air canal

The need to reduce the energy demand of processes also creates pressure make atomizers more efficient. A promising development path could be counterflow (CFA). An atomizer, or synonymously a nozzle, is device that turns liquid into spray. CFA twin-fluid type atomizer because both and atomizing gas are fed it. Initial results suggest capable same quality atomization but using half air mass flow rate compared conventional twin-fluids when operated at identical inlet pressure. This means requirements with efficiency. shows great promise in highly viscous substances such as waste-based fuels biomass oils. In CFA, expands twice; first, discharge from canal mixing tube, second, surrounding atmosphere. Therefore, one main control parameters area ratio exit orifice canal. study experimentally investigates effect this on spray for two different Phase Doppler Anemometry (PDA), which provides velocity size individual droplet were 100 200 kPa gas-to-liquid (GLR) ratios 5, 10 20%. double expansion can well observed differences between inside tube. length insert had significant performance. For shorter channel, minimal was observed; behaved like all expansions occurred downstream orifice. longer changed internal ratios, larger droplets, wider higher coefficients (Cd) obtained.