标题： 一维离散玻尔兹曼模型用于爆炸和异常爆炸现象 显示英文标题

标题： A One-Dimensional Discrete Boltzmann Model for Detonation and an Abnormal Detonation Phenomenon

摘要： 一种用于爆炸模拟的一维离散玻尔兹曼模型被提出。 而不是数值求解纳维-斯托克斯方程，该模型通过数值求解特别离散化的玻尔兹曼方程来获得流场信息。 通过模拟包括索德激波管、科尔勒爆炸问题以及一维自持稳定爆炸在内的几个经典基准问题来验证新模型。 基于新模型，进一步研究了反应速率负温度系数对爆炸的影响。 发现在负温度系数条件下，会出现具有两个波头的异常爆炸并周期性出现。 分析了异常爆炸的原因。 讨论了一个典型的周期性异常爆炸及其发展过程。 显示英文摘要

摘要： A one-dimensional discrete Boltzmann model for detonation simulation is presented. Instead of numerical solving Navier-Stokes equations, this model obtains the information of flow field through numerical solving specially discretized Boltzmann equation. Several classical benchmarks including Sod shock wave tube, Colella explosion problem, and one-dimensional self-sustainable stable detonation are simulated to validate the new model. Based on the new model, the influence of negative temperature coefficient of reaction rate on detonation is further investigated. It is found that an abnormal detonation with two wave heads periodically appears under negative temperature coefficient condition. The causes of the abnormal detonation are analyzed. One typical cycle of the periodic abnormal detonation and its development process are discussed.