Design and experimental investigation of combustors atomizing device

Abstract

Design procedure of combustors atomization device including pressure swirl fuel nozzle +air axial swirler + its sidewall is proposed based on hydraulic calculations of simple pressure swirl fuel atomizer and air swirler. Geometrical parameters are chosen so that fuel jets are not collided with air swirler wall and propagated in air layer or near its inner boundary at the end of the sidewall. Example of atomizing device PS-90 type is given. By means of optical diagnostics for simultaneous fuel drop size and concentration determination in spray cross sections, modified atomization system were developed with low drop size (SMD lesser 20μm) and angular non-uniformity (lesser 15%).