POWRE: Group Modeling of Droplet Dispersion and Evaporation in Turbulent Sprays

该研究项目将重点研究喷雾建模，为基础研究和工程设备的开发提供有效的工具。研究结果将被纳入工程课程。为液滴分散和蒸发湍流喷雾的建模提供了一种有效的分组方法。该模型使用液滴组来表示喷雾。由于液滴的湍流分散，每个包含许多液滴的组具有随时间增长的尺寸范围。该模型将考虑气相湍流对液滴分散的影响，以及汽化和多液滴相互作用对一组内液滴汽化的影响。湍流喷雾燃烧过程在许多工程应用中得到了应用。了解该过程的机理对提高这些过程的效率和更好地控制燃烧产物中的污染物至关重要。为此，计算流体动力学（CFD）得到了越来越多的应用。虽然CFD模型已经取得了很大的进展，但液滴弥散和汽化等子模型仍有待改进，这是本研究的目的。

ABSTRACT CTS-9753287 Qian Zhou/Purdue This research program will focus on spray modeling that will provide an efficient tool for fundamental studies and the development of engineering devices. The results of the research will be incorporated into engineering curriculum. An efficient group approach for the modeling of droplet dispersions and evaporation turbulent sprays will be developed. The model uses droplet groups to represent a spray. Each group containing many droplets has dimensional extent that grows with time due to turbulent droplet dispersion. The model will take into account of the effects of gas-phase turbulence on the droplet dispersion as well as vaporization and multiple-droplet interaction effects on droplet vaporization within a group. Turbulent spray combustion processes are utilized in many engineering applications. Understanding of mechanisms of the process is vital to the improvement of the efficiency of these processes and better control of pollutants in combustion products. For this purpose, computational fluid dynamics (CFD) has been used increasingly. Although much progress has been made in CFD models, submodels such as droplet dispersion and vaporization still require improvement, which is the aim of the present research.