On the understanding of spray combustion

拟议的研究计划旨在提高我们对几种工程动力系统中使用的喷雾燃烧现象的物理理解，这些系统包括吸气推进系统、柴油发动机和液体燃料火箭发动机等。提出了涉及喷雾燃烧不同方面的两个基础研究课题，分别是：(A)在真实环境压力和温度条件下湍流环境中燃料（液）液滴汽化燃烧的实验研究；(B)液体射流与横向气流相互作用的破碎实验研究。这两个项目是有联系的，液体破碎是控制喷雾（液滴）形成的机制，而液滴蒸发和燃烧发生在液体射流破碎和液滴形成之后。

The proposed research program aims at advancing our physical understanding of spray combustion phenomenon employed in several engineering power systems, which include air-breathing propulsion systems, diesel engines and liquid-fuelled rocket engines, among others. Two fundamental research projects related to different aspects of spray combustion are proposed, which are: (A) Experimental study of the vaporization and combustion of fuel (liquid) droplet in turbulent flow environments under realistic ambient pressure and temperature conditions, and (B) Experimental study of the break-up of a liquid jet interacting with a cross airflow. Both projects are related in that liquid break-up is the mechanism governing the formation of spray (droplets), whereas the droplet evaporation and combustion happen after the break-up of liquid jet and the formation of droplets.