To avoid the influence of external parameters, such as the vessel volume or the initial turbulence, the explosion severity should be determined from intrinsic properties of the fuel-air mixture. Therefore, the flame propagation of gaseous mixtures is often studied in order to estimate their laminar burning velocity, which is both independent of external factors and a useful input for CFD simulation. Experimentally, this parameter is difficult to evaluate when it comes to dust explosion, due to the inherent turbulence during the dispersion of the cloud. However, the low inertia of nanoparticles allows performing tests at very low turbulence without sedimentation. Knowledge on flame propagation concerning nanoparticles may then be modelled and, under certain conditions, extrapolated to microparticles, for which an experimental measurement is a delicate task. This work focuses on a nanocellulose with primary fiber dimensions of 3 nm width and 70 nm length. A one-dimensional model was developed to estimate the flame velocity of a nanocellulose explosion, based on an existing model already validated for hybrid mixtures of gas and carbonaceous nanopowders similar to soot. Assuming the fast devolatilization of organic nanopowders, the chemical reactions considered are limited to the combustion of the pyrolysis gases. The finite volume method was used to solve the mass and energy balances equations and mass reactions rates constituting the numerical system. Finally, the radiative heat transfer was also considered, highlighting the influence of the total surface area of the particles on the thermal radiation. Flame velocities of nanocellulose from 17.5 to 20.8 cm/s were obtained numerically depending on the radiative heat transfer, which proves a good agreement with the values around 21 cm/s measured experimentally by flame visualization and allows the validation of the model for nanoparticles.

为了避免外部参数（例如容器体积或初始湍流）的影响，应根据燃料-空气混合物的固有特性确定爆炸的严重程度。因此，经常要研究气体混合物的火焰传播，以估计其层状燃烧速度，该速度既与外部因素无关，又对CFD模拟有用。在实验中，由于云散布过程中固有的湍流，因此在灰尘爆炸时很难评估此参数。然而，纳米颗粒的低惯性允许在非常低的湍流下进行测试而不会沉淀。然后，可以对有关纳米粒子的火焰传播知识进行建模，并在某些条件下外推到微粒，为此，实验测量是一项艰巨的任务。这项工作集中在一次纤维的尺寸为3纳米宽度和70纳米长度的纳米纤维素上。基于已经验证了类似于烟灰的气体和碳纳米粉的混合混合物的现有模型，开发了一个一维模型来估算纳米纤维素爆炸的火焰速度。假设有机纳米粉快速脱挥发分，所考虑的化学反应仅限于热解气体的燃烧。有限体积法被用来求解组成数字系统的质量和能量平衡方程以及质量反应速率。最后，还考虑了辐射传热，突出了颗粒总表面积对热辐射的影响。纳米纤维素的火焰速度从17。