## Abstract

This paper presents a combustion model of a nano-aluminum-air (nAl-air) suspension. The special feature of the model is performing a local mathematical model of the oxidant diffusion through an aluminum oxide layer on the particle surface taking into account the aluminum-oxidant reaction to simulate the combustion of nano-size aluminum (nAl) particles. The oxidation rate of the aluminum particles and the associated with this process the rate of heat release are determined from the solution of the local combustion problems for the entire set of nAl particles in the suspension. To obtain the suspension state parameters we solve the equation system, which includes the energy conservation equations for the gas and particles, the mass-conservation equation for the gas-dispersed mixture and the motion equations for the gas and particles controlling for the particle velocity lag. The model considers gas expansion and thus gas and particle motion. The developed model does not require setting the ignition temperature of nAl particles. The study provides the calculated propagation rate of the combustion front in the nAl-air suspension depending on the nAl mass concentration and on the initial temperature of the suspension.

Original language | English |
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Pages (from-to) | 177-193 |

Number of pages | 17 |

Journal | Combustion Theory and Modelling |

Volume | 24 |

Issue number | 2 |

DOIs | |

Publication status | Published - 3 Mar 2020 |

## Keywords

- aluminum combustion model
- mathematical simulation
- nanoaluminum combustion
- nanoaluminum-air suspension

## ASJC Scopus subject areas

- Chemistry(all)
- Chemical Engineering(all)
- Modelling and Simulation
- Fuel Technology
- Energy Engineering and Power Technology
- Physics and Astronomy(all)