撞击流对喷雾燃烧过程的强化机理研究

项目名称： 撞击流对喷雾燃烧过程的强化机理研究

项目编号： No.51306075

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 杜敏

作者单位： 江苏大学

项目金额： 25万元

中文摘要： 撞击流是针对强化气固相间热质传递过程而提出的，现已广泛应用于煤气化、燃烧、干燥、萃取等工业过程中。撞击流能够有效强化燃烧过程，但由于撞击流内物理化学过程非常复杂且迅速，其中所包含的强化机理还不清楚。本课题将针对撞击流对喷雾燃烧过程的强化理展开研究。 本课题拟以喷雾撞击流燃烧为研究对象，构建雾滴碰撞后续发展模型，首次建立基于直接模拟蒙特卡洛(DSMC)方法的喷雾撞击流燃烧综合模型。以实验研究、理论分析与数值模拟为手段，对撞击流内喷雾燃烧过程与雾滴蒸发规律、雾滴运动，碰撞及后续发展规律、以及气相流场及组分分布规律等的相互作用进行分析研究，掌握喷雾撞击流燃烧过程的关键影响因素和最佳操作参数，揭示撞击流对喷雾燃烧过程的强化机理。本课题的难点在于撞击流强化喷雾燃烧过程的关键影响因素的寻求，以及雾滴碰撞后续发展模型的构建等。 本课题的成功实施，将为撞击流在喷雾燃烧领域的有效应用奠定更坚实的理论基础。

中文关键词： 撞击流；喷雾燃烧；;液滴碰撞；强化机理；5

英文摘要： The scientific concept of impinging streams (IS) was proposed to intensify the interphase heat and mass transfer process in gas-particle two-phase systems. The IS devices have a broad application in some industrial processes, such as coal gasification, combustion, drying, extraction, etc. IS can enhance the combustion process. Nevertheless, the physical and chemical processes in an IS are extremely complex and fast, in which the enhanced mechanism is not clear. This project will study on the enhanced mechanism of spray combustion process by IS. The spray combustion in IS is used as the research object in this project. The later development model after collision between droplets will be proposed, and then the integrated mathematical model for the spray combustion process based on the DSMC method will be established for the first time. Based on combination of the experimental study, theoretical analysis and numerical simulation, the interactions of spray combustion process and the law of droplet vaporization, the law of droplet motion, collision and later development, the gas phase flow field, the gas component distribution, and so on, will be analyzed. The main influencing factors and the optimum operating parameters of spray combustion in IS will be obtained to reveal the enhanced mechanism of spray combustion p

英文关键词： impinging streams；spray combustion；droplet collision；enhanced mechanism；5