Laser imaging of transient mixing in simulated rocket chambers
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An experimental investigation of transient gas-gas mixing is described. Our project is part of the NASA Constellation University Institutes Project (CUIP) program. We discuss experimental measurements of the transient gas-gas mixing process using an injector and mixing chamber designed to simulate the mixing process in a rocket chamber. In our experiments, N2is used as an oxidizer simulant in place of gaseous O2and helium is used as a fuel simulant in place of gaseous Ha. Laser-induced fluorescence (LIF) of nitric oxide (NO) is used to measure the mixture fraction of injected flows within the chamber. Three-dimensional effects are probed by imaging at different planes along the injector slot. The experiment was designed so that the results could be modeled using computational fluid dynamics (CFD). Results from two different chamber configurations are discussed.
