화학공학소재연구정보센터
Chemical Engineering Research & Design, Vol.118, 215-225, 2017
Analysis of heat and mass transfer in diffusion flame reactors coupled with aerodynamic lenses
In this paper, it is presented a numerical investigation of the main phenomena involved during the synthesis of nanoparticles in a diffusion flame reactor coupled with an aerodynamic lens system. The lenses are used to restrict the main flow to a small region, allowing the particles to be directed to a collector surface in order to create nanoparticles films with specific shapes. The performance of the system was evaluated by the analysis of the velocity, temperature and concentration fields in order to validate the experimental data and to provide information about the process. The model considered continuous gas phase under steady-state conditions and compressible turbulent flow. By changing the system geometry, we investigated various configurations to determine the optimum geometry and operation mode of cluster sources for particle focusing. The coupling techniques show very promising features in view of the particle focusing to nanostructured films manufacturing, enabling novel functional and structural properties. The results show that the aerodynamic lenses system can restrict the main flow to a much narrow region in comparison with the reactor with no lens, therefore helping the control of film deposition. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.