Chemiluminescence imaging of flames with partial premixing

部分预混合火焰的化学发光成像

• 批准号: 344882-2007
• 负责人: Sobiesiak, Andrzej
• 金额: $ 6.43万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=326284
• 关键词: Chemiluminescence; imaging; flames; partial; premixing

I am requesting funding to purchase the apparatus for chemiluminescence imaging in flames.  Chemiluminescence is the light emission from an atom or molecule that is electronically exited by a chemical raction. In falmes, the intensity of the reaction rate is proportional to the magnitude of OH* and CH* chemiluminescence and its measurements map out the spatial and temporal distribution and variations of the combustion process heat release. The flame chemiluminescence will be acquired with high speed filming of the combustion zone with an intensified imager camera. The proposed equipment will be used in support of research on low temperature oxidation in which flames are partially premixed and contain large amounts of recirculated combustion products. This research program is focused on a laboratory scale realization of "flameless oxidation" burners that have been investigated by the applicant before at full-scale. These are extremely low polluting, efficient combustion devices relaying on separate injection of fuel and air directly into the furnace, entraining combustion products and lowering the flame temperature and NOx emissions. The small-scale realization is an inverse non-premixed flame burner with co-flowing streams that deliver air, fuel, inert gas (e.g. N2), and heated combustion products. Initial characterization of such a burner in terms of flame visualization, stability limits, and temperatures was completed and results were published. To make further qualitative progress, the level of premixing and the effects of product gasses entrainment on the reaction rate need to be quantified, and chemiluminescence is an ideal technique with which to do it.  The requested imaging system will be also suitable for other low temperature combustion studies, including Homogenous Charge Compression Ignition (HCCI) in engines, and combustion with H2 and CO supplementation. The chemiluminescence technique is an exciting flame diagnostics technique that present ample opportunities for training graduate students in the area of data acquisition, image processing and combustion visualization.

我正在申请资金，以购买火焰中化学发光成像的设备。化学发光是指原子或分子通过化学反应以电子方式发出的光。在FALAS中，反应速率的强度与OH*和CH*化学发光的大小成正比，它的测量绘制了燃烧过程放热的时空分布和变化。用增强型成像仪对燃烧区进行高速拍摄，可获得火焰化学发光。拟议的设备将用于支持对低温氧化的研究，在低温氧化中，火焰部分预混并含有大量再循环燃烧产物。本研究项目的重点是在实验室范围内实现“无焰氧化”燃烧器，该燃烧器已经由申请人在全尺寸之前进行了研究。这些都是污染极低的高效燃烧设备，依靠将燃料和空气分别直接喷射到炉膛中，携带燃烧产物，降低火焰温度和NOx排放。小规模的实现是一种反向的非预混火焰燃烧器，具有输送空气、燃料、惰性气体(例如氮气)和加热燃烧产物的同流气流。完成了这种燃烧器在火焰可视化、稳定性极限和温度方面的初步表征，并公布了结果。为了取得进一步的定性进展，需要量化预混程度和产品气体夹带对反应速率的影响，而化学发光是一种理想的技术。所要求的成像系统也将适用于其他低温燃烧研究，包括发动机均质充气压缩点火(HCCI)和补充H2和CO的燃烧。化学发光技术是一种令人兴奋的火焰诊断技术，它为研究生在数据采集、图像处理和燃烧可视化领域提供了大量的培训机会。