A vented corn starch dust explosion in an 11.5 m³ vessel is studied using both experimental and numerical methods. The reduced explosion overpressure in the vessel is recorded using two pressure sensors mounted on the wall inside of the vessel. Unsteady three-dimensional Reynolds-Averaged Navier-Stokes simulations of the experiment are performed using the Flame Speed Closure (FSC) model of the influence of turbulence on premixed combustion. The model was thoroughly validated in previous studies and was earlier implemented into OpenFOAM CFD software. The self-acceleration of a large-scale flame kernel is associated with the influence of combustion-induced pressure perturbations on the flow of unburned reactants ahead of the kernel. Accordingly, the FSC model is extended by adapting the well-known experimental observations of the self-similarity of the kernel acceleration. Influence of different turbulence models on the simulated results is also explored. Thanks to the extension of the FSC model, the measured time-dependence of the pressure is well predicted when the k-omega-SST turbulence model is used.

11.5 m ^{3 的}通风玉米淀粉粉尘爆炸使用实验和数值方法研究容器。使用安装在容器内壁上的两个压力传感器记录容器中降低的爆炸超压。使用湍流对预混燃烧影响的火焰速度闭合 (FSC) 模型进行实验的非定常三维雷诺平均纳维-斯托克斯模拟。该模型在之前的研究中得到了彻底的验证，并且更早地被实施到 OpenFOAM CFD 软件中。大规模火焰核的自加速与燃烧引起的压力扰动对核前未燃烧反应物流动的影响有关。因此，FSC 模型通过调整众所周知的内核加速度自相似性实验观察得到扩展。还探讨了不同湍流模型对模拟结果的影响。由于 FSC 模型的扩展，当使用 k-omega-SST 湍流模型时，可以很好地预测压力的测量时间依赖性。