RAMSCRAM: A Flexible RAMJET/SCRAMJET Engine Simulation Program

Abstract

With the resurgence of interest in high supersonic and hypersonic flight there is a need to simulate airbreathing engines which may be used in this flight regime. To meet this requirement the RAMSCRAM code was developed. The code calculates one-dimensional flow properties at each component interface and the overall performance of the engine. It uses equilibrium thermodynamics which accounts for dissociation and allows for any fuel or combination of fuels. The program can simulate ramjet, scramjet, rocket, and ducted rocket engines.

Development of an Integrated Parametric Environment for Conceptual High Speed Missile Sizing

“…The propulsion analysis consists of the RAMSCRAM FORTRAN analysis code developed by NASA [4]. It was designed for the cycle analysis of hypersonic, airbreathing propulsion systems, including ducted rockets, ramjets, and scramjets.…”

“…RAMSCRAM uses equilibrium thermodynamics to account for high temperature and real gas effects, and allows for any fuel (for which the detailed chemical information is known) to be used. It can create an engine deck for a given design point (Mach, altitude, and angle of attack) that covers a predetermined range of off design points [4]. Using the external inlet geometry as inputs, RAMSCRAM is able to calculate the pressure distribution across the inlet.…”

Improvements and enhancements to SCCREAM, a conceptual RBCC engine analysis tool

“…As previously documented, RAMSCRAM 3,11 data has been generated based upon a similar Hyperion engine geometry and flight path. It should be noted that a ramjet to scramjet transition Mach number of 6 was used for the RAMSCRAM data, but Hyperion now transitions at Mach 5.5.…”

SCCREAM (Simulated Combined-Cycle Rocket Engine Analysis Module) - A conceptual RBCC engine design tool

“…RAMSCRAM [8] is a ramjet and scramjet analysis tool developed by the NASA -Lewis Research Center. It is also capable of modeling ejector mode.…”