A comparison of scramjet integral analysis techniques

Two integral analysis methods are compared in order to establish their relative effectiveness in estimating the performance characteristics of a scramjet engine. While the first method is a two-step process that assumes constant ara combustion followed by constant Mach number combustion, the second is a one-step process in which combustion is assumed to follow a Crocco presure-area relationship. Results indicate that the constant property process underpredicts the expected engine performance, especially at the end-of-boost-phase Mach number of 3.5.