【摘要】 燃烧法合成碳纳米管是一个全新的技术和研究领域,有极大的发展前景。提出了V型火焰合成碳纳米管的方案,并利用FLUENT软件对其燃烧过程进行了数值模拟。经过对几种模拟的结果进行分析和比较,结果表明:模拟结果所设的边界条件有利于碳纳米管的生成,可应用于进行实验的理论指导。所得出的结论与理论推断基本上相吻合,而且几种形态的结果理论上相互统一。通过对数值计算结果与相关文献比较,验证了计算结果的合理性与可用性。"热解"火焰把热和合成碳纳米管过程分开,可在范围较大的热解区域收集碳纳米管。V型热解火焰的易于稳定、控制,可能是实现工业放大的一种比较合适的方式。数值模拟研究结果将对实验提供预期参考和帮助。更多还原

【Abstract】 Combustion-synthesis of carbon nanotubes is a completely new technique and research domain,which has enormous developmental foreground.The V-type flame is proposed to synthesize carbon nanotubes,and the corresponding burning process is simulated and analyzed with commercial CFD code Fluent.The simulation results are compared and analyzed to prove that the boundary condition set in the model is beneficial for the synthesis of carbon nanotubes.The results of different forms also show good agreement with theoretical analysis.The simulation results are analyzed and the method is proved to be feasible according to the comparison between the modeling results and reference papers’ data.Heating and material synthesis processes in the "pyrolysis flames" are substantially separated functions.Carbon nanotubes are collected at major region of the "pyrolysis flames".The V-type flame is stable and easy to be controlled,thus it may be a promising way to be used in full scale field.Numerical simulation is a good guidance and help for the experimental research.更多还原