Experimental study of flame chemiluminescence for premixed methane based binary fuel flames

IF 2.8 2区工程技术 Q2 ENGINEERING, MECHANICAL Experimental Thermal and Fluid Science Pub Date : 2024-09-28 DOI:10.1016/j.expthermflusci.2024.111326

Zhengzhe Fang , Yushuai Liu , Yannis Hardalupas , A.M.K.P. Taylor

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Abstract

The growing requirements in using natural gas with varying compositions, biogas, syngas, and hydrogen enriched natural gas have increased the need for fuel composition and equivalence ratio sensing methods for modern gas turbine combustors. Chemiluminescence has been suggested as a promising heat release rate and equivalence ratio indicator in methane premixed flames. However, its ability in flames fuelled by the complex composition of fuels is less understood. Therefore, the main object of the present study is assessing the chemiluminescence based equivalence ratio and fuel composition sensors in binary mixtures fuelled premixed flames. The CH₄ + C₃H₈, CH₄ + CO₂, and CH₄ + H₂ fuel mixtures are selected since they are typical compositions for the interested fuel applications. A thorough analysis of chemiluminescence characteristics including spectrum, flame patterns, chemiluminescent intensities, and intensity ratios was conducted by the measurements in a counterflow burner. The results conclude that the OH*/CH(A) chemiluminescent intensity ratio with proper removal of background emission is competent for indicating fuel composition and equivalence ratio for the examined fuel mixtures. The intensity ratio between CO₂* and OH*, CH(A), and C₂* can be used to monitor the proportion of C₃H₈, H_2, and CO₂ respectively in the methane-based fuel mixtures.

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基于二元燃料的预混合甲烷火焰化学发光实验研究

随着对使用不同成分的天然气、生物气、合成气和富氢天然气的要求不断提高，现代燃气轮机燃烧器对燃料成分和等效比传感方法的需求也日益增加。化学发光被认为是甲烷预混合火焰中一种很有前途的热释放率和等量比指标。然而，人们对其在燃料成分复杂的火焰中的能力了解较少。因此，本研究的主要目的是评估二元混合物燃料预混合火焰中基于化学发光的当量比和燃料成分传感器。选择 CH4 + C3H8、CH4 + CO2 和 CH4 + H2 燃料混合物是因为它们是相关燃料应用中的典型成分。通过在逆流燃烧器中进行测量，对包括光谱、火焰形态、化学发光强度和强度比在内的化学发光特性进行了全面分析。结果表明，在适当去除背景发射的情况下，OH*/CH(A) 化学发光强度比可用于指示所研究燃料混合物的燃料成分和当量比。CO2* 与 OH*、CH(A) 和 C2* 的强度比可分别用于监测甲烷基燃料混合物中 C3H8、H2 和 CO2 的比例。

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来源期刊

Experimental Thermal and Fluid Science 工程技术-工程：机械

CiteScore

6.70

自引率

3.10%

发文量

159

审稿时长

34 days

期刊介绍： Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.