【作者】 李玉兰；

【导师】 王谦；

【作者基本信息】 江苏大学 ， 工程热物理， 2008， 硕士

【摘要】 随着微动力机电系统(Power-MEMS)的发展,微尺度燃烧的研究是为了满足汽车、机电、航空和军事等领域内微动力机电系统的高能量密度和长寿命的需求而开展的。微尺度燃烧器是微动力机电系统的核心部件,微尺度燃烧特性研究是研发高效、稳定持续燃烧的微燃烧器的基础。由于本研究领域还比较新,还有许多科学和技术难题需要去解决。本文研究主要围绕微尺度燃烧室内氢气空气预混燃烧特性和稳定性展开的。首先对微尺度燃烧的一些可能的利用方式进行了阐述,回顾了微尺度燃烧的国内外研究现状,分析和总结了开展微尺度燃烧研究所需要面临的问题;然后对微尺度燃烧室的燃烧过程进行了三维稳态数值模拟研究,取得了一些具有学术意义和参考价值的结果。主要工作如下:(1)考虑到微尺度燃烧特点,建立了合理的物理和数学模型,特别是对微传热过程进行了分析,建立了微传热模型。(2)对微管内氢气空气预混燃烧过程进行了三维稳态数值模拟研究,并分析了微尺度燃烧特性。(3)对微管内燃内氢气空气预混燃烧的影响因素进行了变参数研究,得到微燃烧室内燃烧特性和稳定性的变化规律。本文研究工作对微尺度燃烧室内的燃烧特性和稳定性进行了一些基础性的研究,微尺度燃烧室中稳定燃烧可以通过选择合适的燃烧室几何形状、壁面材料、初始条件和较好的控制散热损失来实现,对进一步设计和优化微尺度燃烧室提供了一定理论依据和参考价值。更多还原

【Abstract】 With the development of Power-Micro Electro Mechanical System, micro-scale combustion is studied to meet the requirement of Power-MEMS with high energy density and long life in automobile, electricity, aviation , military field and so on. It is of great significance to the development of our country’s science, technology and economy. At the beginning of its study from the middle of the 1990’s, there are still a number of scientific and technical problem needs to be resolved.This thesis focuses on hydrogen and air premixed combustion characteristic and stability in micro-scale tube. Some work was developed with numerical simulation methods. First, several possible using methods of micro-scale combustion were described; Secondly, recently research status of micro-scale combustion were reviewed at home and abroad; Thirdly, problems on micro-scale combustion research, which will be faced with of was analyzed and summarized; Finally, three-dimension numerical simulation of hydrogen and air premixed combustion in micro-scale tube was studied, some results with science meaning and reference value were gained. The main content of this paper is as follows:(1) The physics and mathematics model were established in consideration of micro-scale combustion characteristics, especially after analyzing micro heat transfer process, micro heat transfer model was established.(2) Three dimension numerical simulation of hydrogen and air premixed combustion in micro-scale tube was performed, and characteristics of micro combustion was analyzed.(3) The effects of factors on combustion in micro-scale tube was researched with changing parameter. variety disciplinarian of combustion characteristics and stability in micro-scale tube was gained according to the numerical simulation results.some basic researches have been done on combustion characteristics and stability in micro-scale tube. Through choosing appropriate combustion chamber geometry shape, wall material, initial condition and controlling heat loss can achieve stability combustion in micro-scale tube, supplying theoretic gist and reference value for further designing and optimizing micro-scale combustion chamber.更多还原