Liquids' atomization with two different nozzles: Modeling of the effects of some processing and formulation conditions by dimensional analysis

详细信息	查看全文 | 推荐本文 |

• 作者：Sandra Mandato^a ; ^{mandato@supagro.inra.fr} ; Eric Rondet^b ; Guillaume Delaplace^c ; Amal Barkouti^a ; Laurence Galet^d ; Philippe Accart^d ; Thierry Ruiz^a ; Bernard Cuq^a
• 关键词：Drop ; Process control ; Multiphase flow ; Atomization ; Dimensional analysis ; Agglomeration
• 刊名：Powder Technology
• 出版年：2012
• 期刊代码：144_00325910
• 类别：et
• 出版时间：July, 2012
• 卷：224
• 期：Complete
• 页码：323-330
• 文件大小：984 K

摘要

Liquid atomization is a largely widespread unit operation. The disintegration of a liquid into droplets depends on the nature of the nozzle, on the process parameters as well as physicochemical characteristics of the fluid. The aim of this work is to study the contribution of the process (liquid outlet speed and air pressure) and physicochemical (viscosity and surface tension) factors on the size distribution of droplets generated by single- and two-fluid flat spray nozzles. The obtained droplet median diameters which range between 77 and 594 渭m for the single-fluid nozzle and between 11 and 599 渭m for the two-fluid nozzle, are discussed in relation with operating conditions of atomization process. Dimensional analysis was performed as a modeling approach. Despite energy input for the droplet formation is known to be influenced by different origins according to single and two-fluid nozzles, it is shown that a unique correlation, with specific values of parameters for each nozzle type, gathers all the parameters affecting droplet size. In the range of process and formulation parameters tested, this correlation is validated and gives satisfactory agreement for the single- and two-fluid nozzles.