1. Ionized Solid Propellant Rocket Exhaust Plume: MiLES Simulation and Comparison to Experiment
- Author
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GUY, Aurelien, FROMENTIN-DENOZIERE, B., PHAN, H.K., CHERALY, A., GUEYFFIER, D., RIALLAND, V., ERADES, C., ELIAS, P.Q., LABAUNE, J., JARRIGE, J., RISTORI, A., BROSSARD, C., and ROMMELUERE, S.
- Subjects
Physics::Fluid Dynamics ,LARGE EDDY SIMULATION ,PLASMAS ,PLUMES ,CFD ,SOLID ROCKET PROPULSION ,Physics::Atmospheric and Oceanic Physics - Abstract
An experimental work has been conducted to characterize the properties of a solid rocket motor exhaust plume, culminating in measurement of its electromagnetic properties including radar backscattered spectrum. Reactive MiLES simulations of the plume, including dispersed alumina phase, have been performed on two meshes (8.4 M and 20 M cells) to characterize the plume\'s turbulence, aerothermochemistry, and ionized structures dynamics. Experimental images of IR, visible and OH spontaneous emission have yielded information on the potential core, the mixing layer, and the flame structures, and suggest a flapping mode of the plume\'s tail. X band phase and transmission measurements have allowed an estimation of the electron density using a 1D model. The role of alkali salts in the ionization process has been confirmed. MiLES simulations have been processed to study the turbulence development; and to emphasize the strong effect of turbulent dispersion of particles. The flame and ionized structures have been compared to RANS simulations, and electron density is compared to experimental results. Electromagnetic simulations have allowed assessing the reliability of the 1D model used to estimate electron number density. Finally, first estimates of the large structures frequency have been obtained analysing the experimental and numerical data. This will allow analyzing the backscattered radar spectrum.
- Published
- 2017
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