Application of CFD-based Analysis Tool to the PS-90A/A2 Combustors to Achieve Low NO Emission Level

Abstract

This paper describes application of CFD based analysis tool for calculation and optimization of aircraft engine PS-90A and PS-90A2 combustors to achieve low NO emission level. Commercial CFD package CFX-TASCflow was used to simulate gas flow inside combustors. The predictive capability of mathematical models was established by comparing the PS-90A combustor simulation results to test rig data. The CFD analysis tool was applied to optimize construction of the PS-90A2 combustor to achieve low NO emission level. Factors affecting thermal NO formation such as temperature level, O concentration and residence time were investigated. The total residence time of burned gases in high temperature zones of combustor was identified as main factor influencing on NO emission level.