DESIGN AND EXPERIMENTAL INVESTIGATION OF 60O PRESSURE SWIRL NOZZLE FOR PENETRATION LENGTH AND CONE ANGLE AT DIFFERENT PRESSURE

The spray penetration is of prime importance for combustion chamber design. Over penetration of the spray leads to impingement of the fuel on the combustion chamber wall and if the walls are cold it causes the fuel wastage. Optimum engine performance is obtained when the spray penetration is matched to the size and geometry of the combustion chamber and methods for calculating penetration. The present work describes the design of pressure swirl nozzle for half spray cone angle of 30° and outline detail of experimental setup, to investigate effect of pressure on penetration length and spray cone angle. Designed pressure swirl nozzle experimentally investigated at different pressures ranging from 3bar to 18 bars in the step of 3 bars. In gas turbine combustor, spray angle has strong influence on ignition performance, flame blowout limits and pollutants, emissions of unburned hydrocarbons and smoke. The results for penetration length and spray cone angle suggest that at designed pressure, pressure swirl nozzle gives best performance.