氣化生質能主要可燃成分為氫氣、一氧化碳及甲烷，對其混合燃燒特性的了解，是氣化生質能應用的必要條件。層流火焰速度是界定燃料燃燒特性的基本參數，應用在紊流火焰之模擬與為燃燒室設計分析等。本論文主要針對甲烷(CH4)搭配一氧化碳(CO)之混合燃氣進行研究，使用自行設計的直管系統進行火焰觀察，並採用光學多點量測技術，觀察常壓下不同當量比及不同混合比例之火焰傳遞速度以及火焰面積變化，以估算層流火焰速度，並與文獻資料比較。
本實驗應用光電二極體觀察火燄通過直管截面多點位置之時間差，並配合火焰傳遞速度量測值以估算火燄面積及計算層流火焰速度；由誤差分析顯示，利用多點量測技術所計算之層流火焰速度，在不同混合比例下之誤差介於5~10%之間。實驗結果顯示火焰傳遞速度與層流火焰速度均隨著均隨著CO混合比([CO]/([CH4]+[CO]))增加而加速，而火焰面積是在85%CO時達到最大值。與文獻比對，顯示本研究所得火焰速度較文獻數據略低，但具備相同的趨勢，顯示本直管火燄速度量測技術之可靠度。

The major combustible components from gasification of biomass are hydrogen (H2), carbon monoxide (CO) and methane (CH4). In order to fully utilize the gasified products, an understanding of the combustion characteristics of the product mixtures is crucial. Laminar flame speed is one of the important properties to characterize fuel gas burning for combustion chamber design as well as in the simulation of turbulent flame propagation. This thesis research focuses on the combustion of the mixtures of CH4 CO. By using a self-designed tube method, the flame propagation speeds along the tube are measured by photodiode. Coupled with the flame area estimation by the time-gap measurements of flame front arrival at different position at the same cross section, the laminar flame speed can be deduced. At different equivalence ratios (∅=0.85,1.0,1.15) and different mixing ratios of Methane and carbon monoxide, the laminar flame speeds are researched and compare with that in the literature.
From error analysis, the uncertainty of the developed tube method for flame speed measurement is between 5 to 10%. The experimental results show that the flame propagation speeds and the deuced laminar speed increase with the amount of carbon monoxide addition until near 85%CO. Higher CO addition decreases the flame speed. Comparing with that in the literature, the measured flame speeds are slightly lower, however possesses the same trend variation, that indicates the reliability of the developed tube measurement method.

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