H2-Air-H2O微混燃烧是NOx近零排放的气体燃烧技术，对于解决我国未来能源与环境的协调发展问题意义重大。以燃烧器尺度变化对湍流预混火焰传播特性、NO生成特性的影响为核心，研究典型微混几何尺度下预混火焰燃烧器形成的火焰区的速度场、温度场和关键组分浓度场的时空分布和演化规律，获得燃烧器尺度影响下湍流预混燃烧过程的湍流传热传质和化学反应相互作用规律；基于DNS计算优化LES模拟方法，改进NO生成化学模型，完善并发展微混燃烧条件下以薄反应区模式为特征的湍流燃烧及NO生成计算方法，发展微混燃烧器全预混燃烧区物理分布重构方法；研究微混燃烧在不同当量比、稀释比和压力条件下的燃烧和NO生成特性，建立可用于未来微混燃烧器结构设计的基础数据库。研究工作将通过实验和数值模拟相结合进行，借助1-10kHz高重频PLIF激光火焰诊断技术和DNS/LES燃烧数值模拟技术展开。

The H2-Air-H2O micro-premixed combustion is a gas combustion technology with near-zero emissions of NOx, which is of great significance for solving the problem of coordinated development of energy and environment in China in the future. Based on the influence of burner scale variation on the turbulent premixed flame propagation characteristics and NO generation characteristics, the velocity field, temperature field and key component concentration field of the flame zone formed by the premixed flame burner under typical micro-premixed geometric scale and their tempoal and spacial distribtution and evolution laws will be studied, the turbulent heat and mass transfer and chemical reaction interaction laws of turbulent premixed combustion process under the influence of burner scale will also be obtained. The LES simulation method will be optimized based on DNS calculation, and the NO generation chemical model will be enhanced.The turbulent combustion and NO generation calculation method characterized by thin reaction zone mode under the condition of mico-premixed combustion will be improved and developed. And the physical distribution reconstruction method of micro-premixed burner in premixed combustion zone will also be developed. The combustion and NO generation characteristics of the micro-premixed combustion will be studied under different equivalence ratios, dilution ratios and pressure conditions. A basic database will be established which can be used for future structure design of mico-premixed burners.The research work will be carried out through a combination of experiments and numerical simulations, using 1-10kHz high-repetition PLIF laser flame diagnostic technology and DNS/LES combustion numerical simulation technology.