Eulerian thermo-mechanical simulations of heterogeneous solid propellants using an approximate projection method
| Autor: | Thomas L. Jackson, Tadbhagya Kumar, Chris H. Rycroft |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Propellant
Materials science 010304 chemical physics General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology Eulerian path 02 engineering and technology General Chemistry Mechanics 01 natural sciences Regular grid Stress (mechanics) Shear modulus symbols.namesake Burn rate (chemistry) Fuel Technology 020401 chemical engineering 0103 physical sciences Projection method symbols 0204 chemical engineering Scaling |
| Zdroj: | Combustion and Flame. 219:198-211 |
| ISSN: | 0010-2180 |
| DOI: | 10.1016/j.combustflame.2020.05.023 |
| Popis: | We present a mathematical model that describes thermo-mechanical deformations and thermal gradients on the unsteady burning of a heterogeneous solid propellant. A scaling study shows that the deformations in solid at combustion timescales can be treated as quasi-static. The resulting thermo-mechanical formulation is formulated on a Cartesian grid and makes use of a weak form of Chorin-type projection method to deal with large difference in shear modulus of constituent materials. A one-dimensional verification study is carried out by comparing numerical simulations with those of an analytical model. In addition, convergence studies for a two-dimensional propellant sandwich configuration are presented for the stress, velocity, and reference map components. Finally, simulations are carried out for a two-dimensional random propellant pack and the time-averaged burn rate and strains are reported. |
| Databáze: | OpenAIRE |
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