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2966 |
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Optimization of detonation spraying based on numerical simulation |
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Igor Smurov* / Ecole Nationale d'ingénieurs de Saint-Etienne (ENISE), France Vladimir Ulianitsky / Lavrentyev Institute of Hydrodynamics SB RAS, Russia Sergey Zlobin/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia |
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Two originally developed software products are applied for simulation of detonation spraying. Software «Deton» allows high accuracy estimation of the gaseous detonation phenomena. Suitability for detonation spraying of the main industrial fuel gases such as hydrogen, methane, ethane, propane, butane, propylene, and acetylene is examined. Based on simulation and analysis on the principal detonation spraying parameters such as temperature and dynamic pressure of the detonation products, preferences in the choice of fuel are defined, including multi-fuel composition. Fuel/oxygen mixtures are analyzed in a wide range of fuel-oxidizer ratios. Recommendations on the choice of explosive mixture are formulated taking into account experimental data on the pre-detonation distances in the detonation barrel. Software «LIH» is intended for high-accuracy estimation of the effect of the detonation products on the particles in the detonation barrel. Spraying parameters for typical powder materials such as metal, ceramic, and cermet are analysed and optimized. The simulation is carried out with the variation of the following parameters: barrel diameter from 10 up to 50 mm, barrel length from 300 up to 2000 mm, explosive charge from 10 to 100% barrel fill, and position of the powder injection changing over the whole length of the barrel. The calculation results are verified by experiments using CCDS2000 spraying apparatus. |