摘要
为了更好地研究二氧化钛纳米颗粒合成过程中生成项模型以及表面氧化反应对颗粒尺寸的影响，用CFD商业软件Fluent，对湍流扩散火焰中的颗粒合成过程进行了详细的数值模拟。在没有通入TiCl4先驱物的情况下，计算出火焰的温度场。然后通过对五种不同工况的对比，讨论了火焰场温度和浓度对颗粒生长的影响。在此基础上考虑了表面氧化反应对颗粒尺寸变化的影响。结果表明：表面氧化反应对颗粒尺寸的分布具有一定影响，但是温度才是颗粒尺寸变化的最主要影响因素。
To study the effects of formation rate and surface oxidation reaction on the size of nanoparticle in the turbulent diffusion flame, simulation was performed by using the commercial CFD-code Fluent. Temperature profiles of the flame are simulated and analyzed first. Effects of temperature and precursor profiles are simulated and discussed on surface oxidation reaction for five different operational conditions. The results show that, temperature is more important than surface oxidation reaction in particles growth.
