Multidisciplinary Optimization of the Fuel Consumption of a Dual Mode Scramjet-Ramjet

Abstract

Dual-mode ramjets have design requirements that are distinct from those of other high speed propulsion systems because they are expected to operate over a wide range of conditions. Several previously examined combustor designs are evaluated over a range of operating conditions using a low order model. The designs under consideration are parametrized by three variables: location of fuel injection, angle of wall divergence and location of wall divergence, and multidisciplinary optimization (MDO) is performed to suggest avenues to improve performance over the entire range, as measured by overall fuel consumption.