带多孔介质的Y形微小通道中燃料与空气的混合强化与稳燃研究

项目名称： 带多孔介质的Y形微小通道中燃料与空气的混合强化与稳燃研究

项目编号： No.51276073

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 范爱武

作者单位： 华中科技大学

项目金额： 76万元

中文摘要： 微小尺度燃烧是目前国际燃烧界的研究热点之一，引起了很多研究者的兴趣。本项目针对微小尺度扩散燃烧中的两个关键问题-燃料与空气的混合强化和稳燃，提出一种带多孔介质的Y形微小燃烧器。它利用两个进气流道之间的夹角使燃料与空气发生碰撞进行初步混合，然后在多孔介质中进一步充分混合和发生燃烧。此外，多孔介质还能预热未燃气体和抑制流体的脉动，从而实现高效、稳燃的目的。本项目拟通过系统地数值模拟和实验研究，重点考察燃料与空气流道之间的夹角、多孔介质材料的种类和孔隙率等关键参数对燃料与空气之间的混合以及燃烧稳定性的影响。本项目的开展对微小尺度燃烧理论和技术的发展均有重要意义。

中文关键词： 微燃烧；多孔介质；混合；点火；火焰驻定

英文摘要： Currently,micro- and meso-scale combustion is a hot spot which attracts the attentions of many reseachers of the combustion community.In this project,we shall concentrate on two key issues in micro-diffusion combustion: the first is the mixing enhenacement of the fuel and air, and the second is flame stablization. For this, we propose a Y-shaped mesescale combustor filled with a porous medium.As there exists an angle between the fuel and air passages,a preliminary mixing can be achieved through the collision of the two gaseous flows.Then,further mixing is realized in the porous medium and combustion occurs in this section.In addition,the porous medium can also preheat the cold fresh mixture and suppress the flow fluctuation,which leads to significant improvement of flame stability. In this project,through systematic numerical simulation and experimental investigation,we will study the impacts of some key parameters, such as the included angle between the fuel and air passages,type and porosity of the porous material,on the mixing of fuel and air and flame stability. It is expected that essential theoretical and technical developments of micro-combustion can be made by carrying out this project.

英文关键词： micro combustion；porous media；mixing；ignition；flame anchoring