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Title: 一維變截面管中超焓燃燒之理論探討
Authors: 蔡志信
Contributors: 修平技術學院機械工程系
Date: 2007-07-01
Issue Date: 2009-10-28T03:56:31Z
Abstract: 超焓燃燒主要是利用熱交換原理,將火焰下游高溫產物的熱量傳遞給上游未燃混合氣,使未燃氣在通過火焰之前先經預熱,以達到超焓的目的。本研究利用高活化能極限近似微擾理論來探討具橫截面積改變的一維流場中之層流、穩態、預混火焰具外部熱迴流的燃燒特性。期望瞭解因橫截面積變化所引起之火焰拉伸、外部熱傳導係數和外部熱傳量對可燃極限和火焰熄滅的影響。結果顯示負拉伸減弱Le<1 的火焰燃燒強度,但增強Le>1 的火焰燃燒強度;反之,正拉伸減弱Le>1 的火焰燃燒強度,但增強Le<1的火焰燃燒強度。對於Le<1 的火焰,當其承受正拉伸時,其可燃極限區的範圍,比承受負拉伸時較為寬廣;反之,對於Le>1 的火焰,當其承受正拉伸時,其可燃極限區的範圍,則比承受負拉伸時較為窄小。計畫編號:NSC95-2221-E164-001;研究期間:200601~200607
Appears in Collections:[Department of Mechanical Engineering & Graduate Institute of Precision Machinery and Manufacturing Technology] Research Project

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