Combustion Augmentation of Low Quality Fuel by Small Amount of Hydrogen

低质量燃料的少量氢气助燃

基本信息

批准号：
03650180
负责人：
WAKAI Kazunori
金额：
$ 1.34万
依托单位：
Faculty of Engineering, Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650180/
关键词：
Combustion Ignition Lean Mixture Low Quality Fuel Limit of Inflammability Methanol Flame Jet Radicals パルスジェットプラズマジェット水素燃焼促進

项目摘要

The first year, next items were made clear using lean propane-air and methanol-air mixture as a low quality fuels with constant volume combustion chamber. (1) The combustion duration of mixture whose equivalence ratio is 0.6 can be reduced to the same duration as stoichiometric mixture by a hydrogen-air flame jet from a very small cavity whose volume is only 1% of main chamber. (2) Moreover, the combustion duration of very lean mixture (a little leaner than the lean limit of in-flammability) can be reduced to the same duration as mentioned above by a hydrogen-oxygen flame jet from the smaller cavity whose volume is only 0.5% of main chamber.Those results were discussed at the 1992-IPEC(International Power Engineering Conference).In the first half of this year, the effect of ignition location in the cavity was studied. The objective of the research was to make clear the effect of radicals in hydrogen jet flames. When it is ignited at the nozzle, most of jet is composed by burnt gas and the concentrations of radicals are expected much less than that ignited at the bottom of the cavity. The results were presented at the JSME/KSME joint thermal engineering conference and it was concluded that the tendency of reduction of combustion could be explained by the radical effect but it is easier to explain by a effect of jet strength, namely turbulence in a main chamber generated by the strong jet.In the last half of this year, the effect of radical concentrations in jet flame was investigated under the same jet flame speeds. It was performed to make clearer the main factor (radicals or turbulence) of combustion augmentation done by a kind of jet flame. The plasma jet was also added into the hydrogen flame jet. The result showed that the effects of radicals are minor factors and the strength of the hydrogen jet flame is the main factor that can reduce combustion duration. The results will be presented at the 7th IPC (International Pacific Congress on Automotive Engineering).

第一年，使用瘦丙烷 - 空气和甲醇空气混合物作为低质量燃料具有恒定体积燃烧室的情况。（1）从非常小的空腔中，其氢气射流射流的燃烧比为0.6的混合物的燃烧持续时间可以将其降低到与化学计量的持续时间相同的持续时间，该空腔的体积仅占主腔室的1％。（2）此外，可以将非常瘦的混合物的燃烧持续时间（比易量不足的瘦小极限）降低到与较小腔体的0.5％主腔室的0.5％的氢 - 氧气火焰喷气喷气机的持续时间相同的持续时间。该研究的目的是清楚自由基在氢射流火焰中的影响。当它在喷嘴上被点燃时，大多数喷气机是由燃烧气体组成的，而自由基的浓度则远小于腔底部点燃的射流。结果是在JSME/KSME联合热工程会议上提出的，得出的结论是，减少燃烧的趋势可以通过激进效应来解释，但是可以通过喷气强度的效果来解释，即通过喷射强度的效果，即由强大的喷气机产生的主室中的湍流。这一年的强度浓度是在Jet Flame中的相同效果，在Jet Flame中，JET的速度是JET的速度。它的执行是为了使燃烧增强的主要因素（自由基或湍流）通过一种喷射火焰所做的。等离子体射流也被添加到氢火焰喷气机中。结果表明，自由基的作用是次要因素，氢射流火焰的强度是可以减少燃烧持续时间的主要因素。结果将在第七届IPC（国际太平洋汽车工程大会）上介绍。