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曹海亮, 徐进良, 张永立, 赵黛青. 微小尺度下氢气预混燃烧的实验研究[J]. 力学学报, 2006, 38(3): 316-322. DOI: 10.6052/0459-1879-2006-3-2005-184
引用本文: 曹海亮, 徐进良, 张永立, 赵黛青. 微小尺度下氢气预混燃烧的实验研究[J]. 力学学报, 2006, 38(3): 316-322. DOI: 10.6052/0459-1879-2006-3-2005-184
Jinliang Xu, . Experimental investigation of microscale premixed combustion of hydrogen[J]. Chinese Journal of Theoretical and Applied Mechanics, 2006, 38(3): 316-322. DOI: 10.6052/0459-1879-2006-3-2005-184
Citation: Jinliang Xu, . Experimental investigation of microscale premixed combustion of hydrogen[J]. Chinese Journal of Theoretical and Applied Mechanics, 2006, 38(3): 316-322. DOI: 10.6052/0459-1879-2006-3-2005-184

微小尺度下氢气预混燃烧的实验研究

Experimental investigation of microscale premixed combustion of hydrogen

  • 摘要: 对内径为1.66mm的不锈钢管燃烧室的氢气预混燃烧实验进行了描述,采用红外测温仪测量了燃烧室壁面的温度场分布,获得了不同燃烧热功率下的运行界限.在突扩段内高温回流区的作用下,在带有5mm长突扩段的燃烧室内可以实现完全预混燃烧,最高运行界限可达1.415.由于较高的进气速度和较大的燃烧室壁面散热,在不带突扩段的不锈钢管内无法实现完全预混燃烧.结果表明突扩段对微小尺度燃烧具有稳定火焰、拓宽燃烧运行界限的作用.通过对火焰形状和结构的观察,结合突扩段燃烧流场的分析,合理解释了燃烧室壁面温度场随过量空气系数的变化规律.

     

    Abstract: This paper describes the hydrogen and air premixedcombustion in a stainless steel tube of 1.66 millimeter in diameter.Temperature fields of combustor wall are measured with infrared thermometerand operating ranges of different combustors are obtained at differentthermal powers. With the help of recirculation zone in the facingback step,premixed combustion can be stabilized in the micro-combustor with a5\,mm-length facingback step and the maximum air excess coefficientis up to 1.415. But the premixed combustion can not be stabilized in thestainless steel tube without facingback step because of higher flow rate andgreat heat loss. It is proved that facingback step can steady the flame andenlarge the operating range for microscale combustion. The relation betweentemperature fields of combustor wall and air excess coefficient isreasonably interpreted by observing the shape and structure of the flame andanalyzing flow fields of combustor with facingback step. The resultscan be used in designs of the microscale combustor.

     

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