A Computational Assessment of Independent Stage Control of a Cascade Injector (Postprint)
CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING
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A computational assessment of independent stage control of a cascade injector was performed. This investigation used computational fluid dynamics to gain understanding of the mechanics governing the penetration characteristics of the cascade injector. Comparison to experimental data, the effects of the first injection stage, and a turbulence model study are presented. The computational solutions predicted penetration height with good accuracy compared to the experimental data, based on planar laser-induced fluorescence of the NO molecule, but were not as successful predicting injectant plume width. Penetration in the near-field was found to correspond with the position of the shock wave generated by the injectant. The Menter turbulence model produced higher values of eddy viscosity in the vicinity of the plume and more spreading, which agreed better with the experimental data. The computational data was also used to generate a synthetic laser-induced fluorescence signal, which was used to improve the penetration boundary prediction.
- Fluid Mechanics
- Jet and Gas Turbine Engines
- Test Facilities, Equipment and Methods