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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effect of interface thermal resistance on ignition of reactive material by a hot particle
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Effect of interface thermal resistance on ignition of reactive material by a hot particle

机译：界面热阻对热粒子点燃反应性材料的影响

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摘要

An ignition model of reactive material (RM) by a hot particle, taking into account the interface thermal resistance (ITR) and reactant consumption is established. The heat transfer process between RM and the particle was described by a radiation boundary condition at the interface. Five regimes were identified from the ignition model through numerical simulations. The criticality of reaction heat on the ignition regime was determined by the sensitivity analysis technique. It was found that a larger ITR would result in a longer ignition delay time, a smaller burnout area and a higher critical reaction heat of RM, and a higher critical radius and initial temperature of the particle. The effects of particle size, initial particle temperature and particle shape on the ignition delay time were more significant at a larger ITR. This work shows that both ITR and reactant consumption have unusual and significant influences on the ignition process of RM by a hot particle, and may have an instructive significance for the hot-spot ignition theory and RM management.
机译：建立了考虑到界面热阻（ITR）和反应物消耗的热粒子对反应材料（RM）的点火模型。 RM和粒子之间的传热过程由界面处的辐射边界条件描述。通过数值模拟从点火模型中识别出五种状态。通过敏感性分析技术确定反应热对点火状态的临界性。发现较大的ITR将导致更长的点火延迟时间，更小的燃尽面积和更高的RM临界反应热，以及更高的临界半径和颗粒的初始温度。在较大的ITR下，颗粒大小，初始颗粒温度和颗粒形状对点火延迟时间的影响更为显着。这项工作表明，ITR和反应物的消耗对热粒子对RM的点火过程都有不同寻常的显着影响，并且对热点点火理论和RM管理具有指导意义。

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