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本文发展了一种新的预混湍流火核生成及初期发展的模型,该模型基于准维模型的基本思想,摒弃了湍流燃烧速度模型,以数值生成的湍流场对火焰前锋面的客观影响推动燃烧计算过程。模型考虑了很多对火核生成及初期发展有影响的因素,如已燃区的传热、非绝热效应、曲率和伸展效应等等;通过利用模拟得到的3维湍流速度场,首次实现了对火核几何形状的3维模拟;模型的模拟结果和试验结果有很好的吻合性,这说明模型是合理的。本文还对容弹中湍流燃烧特性以及湍流强度和湍流标尺对燃烧的影响进行了详细讨论。
In this paper, a new model of pre-mixed turbulence nuclear nucleation and initial development is developed. Based on the basic idea of quasi-dimensional model, the model abandons the turbulent combustion velocity model and promotes the objective influence of the turbulent flow field on the flame front Combustion calculation process. The model takes into account many factors that have an impact on the nucleation and initial development of the nucleus, such as the heat transfer, non-adiabatic effect, curvature and extension effect of the burnt zone. By using the 3-D turbulent velocity field simulated, The three-dimensional simulation of the nucleus of the nucleus of the nucleus of the fire has been done. The simulation results of the model agree well with the experimental results, which shows that the model is reasonable. The paper also discusses the characteristics of turbulent combustion in turbulent charge, as well as the influence of turbulence intensity and turbulence scale on combustion.