The Effect of Thermophoresis on Flame Propagation in Nano-Aluminum and Water Mixtures

Bidabadi, Mehdi; Ramezanpour, Milad; Mohammadi, Moein; Fereidooni, Jalil

doi:10.3311/ppch.8441

Cited by 2 publications

(1 citation statement)

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“…In another study, burning speed, stabilization point and the effect of strain rate for the premixed combustion of aluminum dust cloud in a counterflow configuration have been analyzed [33]. Concerning thermophoresis, Bidabadi et al [34] presented a model analyzing the effects of thermophoresis on the combustion of aluminum particles and water. To the best of our knowledge, an analytical model of the nonpremixed combustion of metal dust in a counterflow configuration is presented in this paper for the first time.…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical modeling of non-premixed counterflow combustion of metal dust

Madani

Bidabadi

Aftah

et al. 2018

J Therm Anal Calorim

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In this study, a semi-analytical model is developed for non-premixed combustion of metal dusts in counterflow configuration. Combustion domain is divided into three separate zones, each of which possesses corresponding mass and energy conservation equations as well as boundary and jump conditions. Metal dust, assumed to be aluminum, undergoes an Arrhenius-type reaction with oxidizer, when it is heated enough to reach the ignition temperature. Dimensionless forms of conservation equations are derived and utilized to elucidate the combustion characteristics. The effects of oxidizer Lewis number and fuel mass concentration on the flame position and temperature are discussed thoroughly. In addition, temperature distribution of the whole domain is calculated by numerically solving the system of partial differential equations. In order to track particles through combustion domain, Lagrangian equations of motion are solved either mathematically or numerically, considering thermophoretic, weight, buoyancy and drag forces. The effects of thermophoretic force on the particle path are investigated, and the deviation of particle from carrier neutral gas direction is obtained. The results showed a great agreement with the data reported in the literature highlighting the fact that the presented model is an efficient one to accurately model the non-premixed counterflow combustion of metal dust.

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Section: Introductionmentioning

confidence: 99%