在下一代空天发动机中，燃烧室内将会达到超临界环境。而目前关于超临界燃烧基础火焰特性的研究接近空白。为合理设计超临界燃烧室，需要掌握航空煤油在超临界燃烧环境中的行为，作为其结构设计、火焰稳定和气流分配方案设计的理论基础。.本项目以实验研究为主，基于超临界航空煤油发生系统、超临界反应釜、燃烧光学测量平台，研究航空煤油液滴（群）在超临界环境中的点火能量、燃烧寿命、组分/温度分布等；采用先进的三维光学诊断技术（VLIF），研究超临界航空煤油预混/非预混燃烧火焰结构、火焰传播速度以及不同喷射/热伴流条件下的燃烧特性；在单模块燃烧室中研究影响超临界火焰稳定的因素，得出火焰浮升高度、贫/富油熄火极限等的影响规律；参考亚临界燃烧室的设计结合超临界燃烧特性，初步得出超临界燃烧室适用的设计准则。本研究将建立航空煤油的超临界燃烧数据库，掌握燃烧基础规律，为高性能空天发动机超临界燃烧室的研制提供理论及技术基础。

In the new generation of aero- and astro-engines, the pressure and temperature in their combustion chamber will become higher and reach the supercritical state of aviation kerosene. There is still a lack of knowledge on basic flame characteristics of supercritical combustion, and the related researches are really challenging. To properly design the supercritical combustion chamber, the combustion characteristics, flame structure and stabilization, which combusts in supercritical environment, need to be grasped and made a foundation for the chamber design..In this project, several systems, including supercritical aviation kerosene production system, supercritical reactors and optical diagnostic platform for supercritical flames, will be established to study the minimum ignition energy, combustion lifetime, distribution of species and temperature for a single droplet of aviation kerosene and a group of droplets in a supercritical circumstance respectively; with utilization of advanced optical diagnostic technique, such as volume laser induced fluorescence, the structures of premixed/diffusion jet flame, laws of flame spreading velocities and other combustion characteristics under different injection or hot co-flow conditions for supercritical aviation kerosene in supercritical environment will be obtained; study the factors influencing the supercritical flame stabilization in a single-module combustor, and find out the influencing laws on minimum ignition energy, lifted height of jet flame and lean/rich blowout limits respectively; based on previous design experience and characteristics of supercritical combustion, formulate a series of primary rules for the design of supercritical combustion chambers..A set of supercritical combustion databases and fundamental laws will be established through this project, which will provide solid theoretical and technological supports for the development of supercritical combustion chamber.