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煤層氣—空氣預(yù)混層流火焰特性試
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on the Premixed Laminar Flames of Coal Bed Methane-air Mixtures
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    摘要:

    利用高速攝影技術(shù),，在定容燃燒彈中研究了不同燃空當(dāng)量比,、初始壓力和煤層氣中CH4濃度對煤層氣燃燒火焰?zhèn)鞑ニ俣群蛯恿魅紵俣鹊挠绊?。研究結(jié)果表明：在燃空當(dāng)量比為1.1時層流燃燒速度最大,；燃燒開始時,，隨著初始混合壓力的增加，最大燃燒壓力明顯增加，火焰?zhèn)鞑ニ俣群蛯恿魅紵俣葴p小，火焰半徑大于40mm后,，層流火焰?zhèn)鞑ニ俣群腿紵俣扔蛛S初始壓力的增加而增大；隨著煤層氣中CH4濃度的增加,，層流燃燒速度和最高燃燒壓力顯著增大,。

    Abstract:

    The effects of bomb under equivalence ratios, initial pressures and CH4 concentrations on the premixed laminar flames propagation velocity and the laminar burning velocity of coal bed methane-air mixtures were studied in a constant volume combustion bomb by high speed video camera. The results showed as follows, when equivalence ratio is 1.1, laminar burning velocity has the largest value; in initial combustion stage, with the increase of initial pressure, maximum combustion pressure markedly increases, laminar flame spread velocity and laminar burning velocity decrease, and when the flame radius exceeds 40mm, laminar flame spread velocity and laminar burning velocity increase; with the increase of CH4 concentration, laminar burning velocity and maximum combustion pressure increase.

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鄭斌,劉永啟,李萍,劉瑞祥,高振強(qiáng).煤層氣—空氣預(yù)混層流火焰特性試[J].農(nóng)業(yè)機(jī)械學(xué)報,2009,40(8):23-26. on the Premixed Laminar Flames of Coal Bed Methane-air Mixtures[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(8):23-26.

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