Automated Nozzle Design through Axis-Symmetric Method of Characteristics Coupled with Chemical Kinetics

Abstract

A method of designing axis-symmetric nozzles with included finite-rate chemical kinetic has been developed. The use of the axis-symmetric method of characteristics coupled with finite-rate chemistry allows for the design and performance prediction of nozzles for liquid rocket engines. The use of a particle swarm / pattern search optimizer will enable viable pressure distributions to initiate the axis-symmetric method of characteristics. The method allows for the nozzle boundary to be formed through a full method of characteristics solution. The contour formed allows for a smooth throat, shock free nozzle. This development allows the process for designing rocket nozzles to be automated, facilitating the design of axis-symmetric nozzles to meet a specific performance goal, while simplifying the effort of the designer. This paper describes the chemical kinetic coupled axis-symmetric method of characteristics, and the associated automated nozzle design methodology.