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マイクロ燃焼の手法による連鎖分岐反応停止に起因する最低火炎温度の特定

微燃烧法识别链式反应终止的最低火焰温度

基本信息

批准号：
19656055
负责人：
丸田薫
金额：
$ 2.11万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Exploratory Research
财政年份：
2007
资助国家：
日本
起止时间：
2007 至 2008
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19656055/
关键词：
燃焼限界火炎温度連鎖分岐反応火災温度

项目摘要

火炎の最低温度を特定し, その決定因子を明らかにするとの目的に対し, メタンおよび冷炎反応を伴う一般的な燃料の代表としてDMEの双方について調べ, 最低火炎温度の顕現やそのメカニズム解明とともに, 両者の特性の相違について明らかに出来た。通常の燃焼現象では発熱により系の温度が決定し, それに伴い消炎や可燃限界などの現象が現れる。しかし燃焼による発熱反応とは独立に, 外部熱源により温度分布を与えるという, 独自の温度分布制御型マイクロリアクターによって, 通常の熱損失メカニズムによらない消炎現象の特定に成功した。前年までの実験によって見いだされた, メタン空気予混合気による極低速時の低速側限界のメカニズムを数値計算により調べたところ, 低流速に起因する物質拡散により活性種の散逸が起こり消炎していることが分かった。さらに経験的にメタンよりも低温でも反応が維持できるとされ, 冷炎現象が観察されるDMEへ本手法を適用したところ, 多段型の低温酸化反応を定常的に観察できることが明らかとなった。その結果, DMEにおける最低火炎温度, 低温領域における冷炎反応や火炎の振る舞いを把握することができた。数値計算により予測された三段反応と, 実験による二段反応の相違について, ガス分析により詳細な検討を行った結果, 実験では不可視の領域に, 冷炎によるホルムアルデヒドの生成を確認でき, 最終的に数値計算による三段反応と実験結果との一致が確認できた。以上により, 最低火炎温度の概念を詳細に解明できた。すなわち, メタンのように一段の反応が起こる燃料に対し, DMEのように多段酸化反応を示す燃料では, 非常に低温の領域から化学反応が開始していることが実験及び数値計算の双方により確認できた。またこれらの知見をベースに, 既存の化学反応機構の検証を行えることを初めて示した。

The lowest temperature of fire is specific, the determining factor is clear, the target is cold, the fuel is common, the fuel represents DME, the lowest fire temperature is clear, the characteristic is clear, the characteristic is clear. Usually, the temperature is determined by the temperature, and the flammability limit is determined by the anti-inflammation. The temperature distribution is independent, the external source is the temperature distribution and the temperature distribution is independent, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by the temperature distribution, the temperature distribution is controlled by The year before last, the air was used to mix the air at the limit of low speed at low speed to calculate the number of air conditions. the low flow rate is caused by the dispersion of chemicals, the release of active chemicals, and the separation of anti-inflammatory and anti-inflammatory devices. The temperature response of the cryopreservation system maintains the temperature response, and the cold inflammation is similar to that of the DME. In this method, the multi-stage low temperature acidizing reaction is stable and stable. The results show that DME temperature is the lowest in the field of fire, cold and cold in the field of low temperature, fire and vibration in the field of low temperature. A number of calculations show that the results of the three segments are correct, the results of the two stages of the calculation are the same, and the results are not applicable to each other. The results are not valid in the field, and the results of the most accurate calculation are consistent with each other. The concept of "minimum fire temperature" and "minimum fire temperature" is very important. In the first part of the experiment, the fuel cycle is affected, and the multi-stage acidizing reaction of DME is used to show the fuel consumption. In the field of low temperature chemical reaction, the chemical reaction system starts to improve the performance of the fuel, and both sides confirm the fuel consumption. If you are aware of the information of the chemical reaction mechanism, the existing chemical reaction mechanism will show that the chemical reaction mechanism is in good condition.