The Validation and Application of Numerical Modelling to Supersonic Mixing and Reacting Flows


This study demonstrates that the computational fluid dynamics (CFD) code GASP can be used to predict the features for flowfields representative of scramjet combustors. The validation program undertaken was composed of two parts: a low enthalpy mixing study and a simplified autoignition study. The low enthalpy mixing study was done using low angle helium injection into a Mach 6 airstream over a flat plate. Both matched and overpressurized injection cases were numerically modelled. The agreement with experimental data for the farfield bulk mixing in both cases was reasonable. The combustion studies modelled premixed hydrogen-air reaction with the results being evaluated qualitatively. GASP proved to be highly sensitive to the chemical species present for flow near the ignition temperature, but provided reasonable qualitative results for a subsonic flameholder model.

Meeting Name

31st Aerospace Sciences Meeting, AIAA ARC (1993: Jan. 11-14, Reno, NV)


Mechanical and Aerospace Engineering

Keywords and Phrases

Compuational Fluid Dynamics; Mathematical Models; Reacting Flow; Supersonic Combustion Ramjet Engines; Turbulent Mixing; Air Flow; Flat Plates; Flow Distribution; Mach Number

Document Type

Article - Conference proceedings

Document Version


File Type





© 1993 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.

Publication Date

14 Jan 1993