Fundamental Study on Controlling Combution for Environmental Protection

本研究旨在阐明如何优化燃烧系统以保护环境，特别关注燃烧和污染物形成的详细机制以及能源的有效利用。每个成员都在分配的主题下进行了一次调查，以澄清每个领域的最新趋势。研究结果已在研究会议上进行了报告和深入讨论，以找出未来需要解决的问题。个人和小组研究工作的主要成果是以下项目的综合信息：煤粉流化床燃烧中一氧化氮、氧化亚氮和颗粒物的生成与破坏机理，等离子体和涡流促进燃烧，燃料浓度和温度变化时低NO_x高温催化剂的开发，柴油颗粒的形成机理，预混喷雾燃烧中基团燃烧的过渡过程，可能促进癌变的多芳烃的定量测量，非预混湍流和非定常喷雾燃烧的数值计算，反应性湍流的直接数值模拟等。在研究会议上，根据每次调研进行了分析，明确了目前急需解决的问题，如：定常与非定常燃烧的建模与数值分析、催化燃烧、煤粉燃烧中颗粒的形成、湍流燃烧的直接数值分析、循环流化床中煤粉的燃烧、湍流燃烧的反应模型、燃烧的主动控制、柴油机中颗粒的减少、以及由于燃烧而形成的致突变物质。这些活动使人们认识到，不仅从科学意义上，而且从环境保护的实际角度来看，功能性燃烧的研究领域应该得到限制和发展。

This study aims at clarificaton of opimizing combution systems for environmental protection, with special regards placed on the detailed mechanisms of combustion and pollutant fomation as well as on effective use of energy resources. Each member has carried out a survey under the allotted subject to clacify recent trends in each area. The result has been reported and discussed in depth in research meetings to find out the problems to be soived in the future.The main outcome of individual and group research work is integrated information on the following items ; mechanism of formation and destruction of nitric oxide, nitrous oxide and particulate matter in fluidized-bed combustion of pulverized coal, promotion of combustion by plasma and swirl, development of high-temperature catalyst for low NO_x during a change in fuel concentration and temperature, mechanism of formation of diesel paticulates, transition process of group combusion in premixed spray combusion, quantitative measurement of polyaromatic hydrocarbons that may promote cancerous growth, unmerical computations of non-premixed turbulent and unsteady spray combustion, direct numerical simulation of reactive turbulent flows, and so forth.In the research meetings, analyzes habe been made based on each survey to clarify the urgent problems to be solved, such as modeling and numerical analysis for steady and unsteady combustion, catalytic combustion, formation of particulate in pulverized coal combustion, direct numerical analysis of turbulent combustion, pulverized coal combustion in circulating fluidized bed, reaction model of turbulent combustion, active control of combustion, reduction of particulates in diesel engines, and formation of mutagenic substanve due to combustion.These avtivities have led to a notion that the research field for functional combustion should be limitiated and advanced not only from scientific significance but also from practical viewpoint of environmental protection.