U.S.-China Cooperative Research (Engineering): Effects of Fuel Properties and Physical Factors on Engine Combustion Processes

人们普遍需要更好地了解发动机系统中发生的燃烧过程。特别是，需要澄清发动机点火、火焰传播和爆震中重要的详细物理和化学过程，并确定燃料性质的影响和相互作用。为了满足这些需求，1989年3月，天津大学和德雷克塞尔大学在NSF的赞助下启动了一个联合研究项目；该项目取得了良好的进展，并将在该奖项下继续下去。这项工作是通过分离和单独研究发动机系统中发生的两种主要过程，即化学过程和物理过程来进行的。德雷克塞尔大学专注于化学过程，而天津大学专注于物理过程。这种分工建立在每个大学的优势和项目的基础上，并有效地利用了现有的资源。Drexel的工作重点是使用各种实验室系统，包括静态和流动反应器系统，分离相关的化学过程，对碳氢化合物进行低温和中温氧化。天津的工作重点是物理因素，如表面沉积、测试转移和流体流动影响，利用各种实验室和发动机测试设施。个体研究工作的协调正在导致确定重要的相互作用，并纳入研究这些相互作用的关键实验。该研究项目的成功完成将有助于更好地了解发动机燃烧和自燃过程中的重要化学和物理过程，从而改善发动机的性能。

There is a general need for a better understanding of the combustion processes occurring in engine systems. In particular, the detailed physical and chemical processes important in engine ignition, flame propagation, and knock need to be clarified, and fuel property effects and interactions determined. In an effort to address these needs, a joint research program between Tianjin University and Drexel University was initiated in March 1989 under NSF sponsorship; Good progress has been made on this program and will be continued under this award. The work is being carried out by separating and individually studing the two major types of processes occurring in engine systems, i.e., the chemical processes and the physical processes. Drexel University is concentrating on the chemical processes, while Tianjin University is concentrating on the physical processes. This division of labor builds upon the strengths and programs at each university and effectively leverages existing resources. The Drexel effort is focusing on low and intermediate temperature oxidation of hydrocarbons using a variety of laboratory systems, including static and flow reactor systems, to isolate relevant chemical processes. The Tianjin effort is focusing on physical factors, such as surface deposits, test transfer and fluid flow effects, utilizing a variety of laboratory and engine test facilities. Coordination of the individual research effort is leading to identification of important interactions and incorporation of critical experiments for studying these interactions. Successful completion of the research program will lead to a better understanding of the important chemistry and physics in engine combustion and autoignition processes, and consequently to improved engine performance.