臺灣博碩士論文加值系統

　　本文主要在於裝置一平面火焰噴嘴燃燒實驗設備，然後用雷射杜普
勒測速儀測量層流預混火焰之傳播速度SL，同時探討伸展率(Stretch-
rate)及超始溫度對火焰傳播速度的影響。本實驗分為預混氣體燃料和
預揮發預混(Prevaporized-premixed)液體燃料兩部分。實驗用氣體燃
料為乙炔(C2 H2)和丙烷(C3 H3)，液體燃料為甲醇(CH3OH)、乙醇
(C2H5OH)和高級汽油。結果可得在不同當量比(Equivalence ratio)或
油氣比(Fuel-air ratio)時之火焰傳播速度SL，同時探討伸展率(Stretch
rate)及起始溫度對火焰傳播速度的影響。本實驗使用直徑0.1~1um的
氧化鎂粉末為LDA量測的幹涉粒子，未燃氣體之起始溫度約為 290°K
∼420°K。

　　In this study, the laminar speeds of premixed stationary flames are measured using laser-Doppler anemometry (L.D.A.). Tested are premixed gaseous fuels, including acetylene (C2H2) and propane (C3H8), as well as prevaporized-premixed liquid fuels, including methanol (CH3OH), ethanol (C2H5OH) and gasoline. The laminar flame speeds SL are measured for different equivalence ratio, stretch rate and initial temperature, with their influence on flame speed are discussed.