Investigation of highly pressurized two-phase, reacting flow.

A single-stage gas gun is used for simulating gun tube flows. The gas gun is driven by the combustion of gas mixtures consisting of Hsub2/0sub2/He, Hsub2/He/CO/Osub2, and CO/Osub2. Thus, the two main combustion reactions occurring in chemical gun propulsion are simulated. Experiments had the goal to improve the knowledge of reacting two-phase (gas/solid) gun tube flows providing a data bank applicable for interior ballistic model validation. Parameters measured include pressure and temperature as well as velocity gradient at various positions along the gun tube. Multi-channel nearinfrared spectroscopy measurements for recording the transient gas phase species were also performed.