Reduction of Nitrogen Oxides by Means of Highly Turbulent Combustion and Modification of Air Composition
通过高湍流燃烧和空气成分改变来减少氮氧化物
基本信息
- 批准号:07455096
- 负责人:
- 金额:$ 4.86万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This study aims at obtaining suggestions for reducing NOx and clarifying the marginal limit of the reduction in the heterogeneous combustion process in practical burners and power systems. The contents of the present study are summarized as follows :1.Production and destruction of NOx in the dilution process of fuel-rich burnt gases are investigated based on detailed chemical kinetics. It was shown that fast mixing due to strong turbulence enables a great deal reduction in NOx formation, and that NOx concentration can be halved if the temperature decreases with the volume expansion in a high-speed piston-engine motion prior to the heat release due to dilution.2.A high swirl burner was tested to investigate the mechanism of the flame stability and the NOx formation. The obtained results showed that a diffusion flame having the same low-NOx level with that in a premixed flame would be formed under a higher swirl number and a stoichiometric fuel-air ratio. Furthermore, the NOx reduction by means of burnt-gas addition in the diffusion combustion was investigated based on a detailed chemical kinetics. It was shown that the burnt-gas temperature should be reduced during recirculation process to reduce NOx, and that a lower temperature can reduce NOx a great deal.3.Exhaust-water-selective recirculation, which operates as a closed system without a supplementary water charge, was proposed for reducing NOx in diesel engine exhaust. The feasibility of the system was experimentally assessed on a single-cylinder test engine. In addition, the effects of intake-air dilution with N2 and CO2 and EGR on the exhaust emissions were predicted and discussed based on a stochastic model. The predicted results showed that cold EGR does not much affect the average temperature, but diminishes gas pockets having a higher-temperature greater than 2,500K,resulting in a great reduction of NO formation.
本研究旨在获得降低NOx的建议,并澄清实际燃烧器和电力系统中非均相燃烧过程中降低NOx的边际界限。本文的研究内容概括如下:1.基于详细的化学动力学,研究了富燃燃气稀释过程中NOx的生成和分解。结果表明,由于强湍流的快速混合可以大大减少NOx的生成,在高速活塞发动机运动中,在稀释放热之前,如果温度随着体积膨胀而降低,NOx浓度可以减半。2.对火焰稳定和NOx生成的机理进行了实验研究。结果表明,在较高的旋流数和化学计量比下,可以形成与预混火焰相同的低NOx扩散火焰。在详细化学动力学的基础上,研究了在扩散燃烧中添加燃气降低NOx的反应机理。研究表明,降低柴油机排气中NOx的方法是降低再循环过程中的燃气温度,较低的温度可以很好地降低NOx。3.提出了一种无补水的选择排水再循环降低柴油机排气中NOx的方法。在一台单缸试验发动机上对该系统的可行性进行了试验评估。此外,基于随机模型,预测和讨论了进气中添加氮气和二氧化碳的稀释以及废气再循环对尾气排放的影响。预测结果表明,冷EGR对平均温度影响不大,但减少了高于2500K的高温气穴,从而大大减少了NO的生成。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
福田 昌准: "水選択排気再循環によるディーゼル機関の窒素酸化物の低減" 日本機械学会論文集(B編). 61-586. 2320-2326 (1995)
Masanori Fukuda:“通过水选择性废气再循环减少柴油发动机中的氮氧化物”,日本机械工程师学会汇刊(B 版) 2320-2326(1995 年)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
M.Shioji: "Effect of Burnt-Gas Addition on Production and Destruction of NOx During the Process of Diluting Burning Gas" Proc.JSME Meeting (Kansai branch). No.974-1. 1-7-1-8 (1997)
M.Shioji:“燃烧气体稀释过程中添加燃烧气体对生成和破坏氮氧化物的影响”Proc.JSME 会议(关西分会)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
M.Fukuda: "Reduction of Nitrogen Oxides of Diesel Engines by Exhaust-Water-Selective Recirculation" Trans.JSME. 61-586, B. 2320-2326 (1995)
M.Fukuda:“通过排气水选择性再循环减少柴油发动机的氮氧化物”Trans.JSME。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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池上 詢: "水選択排気再循環によるディーゼル機関の窒素酸化物の低減" 日本機械学会論文集(B編). 61-586. 2320-2326 (1995)
Akira Ikegami:“通过水选择性废气再循环减少柴油发动机中的氮氧化物”,日本机械工程师学会汇刊(B 版)2320-2326。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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塩路 昌宏: "強旋回流による火炎安定化およびNOx低減" 第33回燃焼シンポジウム前刷集. 219-221 (1995)
Masahiro Shioji:“通过强旋流实现火焰稳定和氮氧化物还原”第 33 届燃烧研讨会预印本集 219-221(1995 年)。
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IKEGAMI Makoto其他文献
IKEGAMI Makoto的其他文献
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{{ truncateString('IKEGAMI Makoto', 18)}}的其他基金
Study of small methanol conversion system for biomass resources
生物质资源小型甲醇转化系统研究
- 批准号:
13650236 - 财政年份:2001
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study on Power System Using High Pressure Air Generator for Saving Energy
电力系统采用高压空气发生器节能研究
- 批准号:
09555073 - 财政年份:1997
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Study on Ignition Mechanism of Non-Uniform Mixture
非均匀混合物点火机理研究
- 批准号:
09450092 - 财政年份:1997
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
A Low-NOx High-Efficiency Engine System for Alternative Fuels by Mean of Ultra-Lean Homogeneous-Charge Premixed Combustion
采用超稀薄均质预混燃烧的低氮氧化物高效替代燃料发动机系统
- 批准号:
07555071 - 财政年份:1995
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Study of Pollutant Formation and Its Control in the Non-Uniform Combustion
非均匀燃烧污染物生成及其控制研究
- 批准号:
05452159 - 财政年份:1993
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Diesel Exhaust Clarification by a High-Pressure Injection in Combination with Selective Exhaust Gas Recirculation
通过高压喷射结合选择性废气再循环来净化柴油机废气
- 批准号:
04555048 - 财政年份:1992
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
Fundamental Study on Controlling Combution for Environmental Protection
环境保护控制燃烧基础研究
- 批准号:
04302029 - 财政年份:1992
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Co-operative Research (A)
A Study of the Thermo Fluid Dynamic Instability Focussing on the Formation and Dissipation of Turbulence in Diffusion Flames
关注扩散火焰湍流形成与消散的热流体动力学不稳定性研究
- 批准号:
03452130 - 财政年份:1991
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Development of a Very High Pressure Injection System for Diesel Engines
柴油发动机超高压喷射系统的开发
- 批准号:
01850048 - 财政年份:1989
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B).
A Study on Combustion in Reciprocating Internal Combustion Engines by Computational Fluid Dynamic Approach
计算流体动力学方法研究往复式内燃机燃烧
- 批准号:
63460098 - 财政年份:1988
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
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