高碳燃料增压燃烧的详细反应机理简化建模及实验验证

项目名称： 高碳燃料增压燃烧的详细反应机理简化建模及实验验证

项目编号： No.91530112

项目类型： 重大研究计划

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 魏小林

作者单位： 中国科学院力学研究所

项目金额： 25万元

中文摘要： 空天飞行器的高超声速发动机和组合发动机普遍存在点火困难和燃烧效率低、宽马赫数运行性能与控制困难等问题，研究碳氢燃料（特别是煤油）增压燃烧，对研制先进发动机具有重要的意义。本项目将建立高碳燃料（煤油）详细化学反应的简化机理模型，根据不同空间区域中的燃烧参数梯度分布，得到相应的简化反应机理，优化煤油增压燃烧的简化机理模型，得到反应速率系数计算的高效算法；实现基于详细反应机理简化建模的煤油增压燃烧CFD数值模拟计算，结合实验验证，得到高超声速发动机以及组合发动机燃烧的模拟结果；基于碳烟生成详细反应机理简化建模的CFD软件求解，获得PAH以及Soot等燃烧主要组分的浓度分布特性；在此基础上，采用新的离散坐标法求解辐射传递方程，获得发动机的喷流辐射特性。研究结果为未来空天飞行器的先进发动机研制提供基础数据与方法支撑。

中文关键词： 高碳燃料；增压燃烧；简化反应机理；燃烧数值模拟；实验验证

英文摘要： Hypersonic jets and combined-cycle engines for aerospace vehicles have the common problems: ignition difficulty, low combustion efficiency, operation property and control difficulty under wide Mach number. Research on hydrocarbon fuel (especially the kerosene) under elevated pressure combustion situations is of great importance in developing advanced aerospace vehicle engines. In this project, a reduced model of detailed reaction mechanisms for hydrocarbon fuel (kerosene) will be built. Based on combustion parameter gradients among different region, the corresponding reduced reaction mechanisms will be obtained. And the reduced reaction model of kerosene combustion will be optimized under elevated pressures. The efficient arithmetic method of calculating reaction rate coefficient is proposed. Combined with the reduced model of detailed reaction mechanisms, CFD numerical simulation of kerosene will be finished in elevated pressure combustion, which will be used to simulate the combustion processes of hypersonic jets and combined-cycle engines. The calculating results will be validated by experimental data. CFD software combined the reduced reaction model of detailed reaction mechanism of soot formation will result in concentration features of major components of combustion, as PAH and Soot. With these results, a

英文关键词： High Carbon Number Fuel；Elevated Pressure Combustion；Reduced Reaction Mechanism；Combustion Numerical Simulation；Experimental Validation