Analysis and Control of Flow and Flutter in Aeroengines

在一个分析和计算调查项目中，研究人员将开发控制理论，使喷气发动机更轻、更高效、更安全。喘振和失速是空气在发动机中流动的不稳定性；颤振是叶片压缩空气的一种振荡。这些不稳定会降低发动机的效率，并且可能是危险的。控制理论旨在控制所有这些不稳定性。如果要制造更轻、更省油和更安全的飞机发动机，目前的技术需要改进。这项研究试图实现这一目标，首先为喷气发动机建立一个数学模型，然后在计算机上模拟这个发动机模型，并使用结果来计算如何设计出更高效、更安全的喷气发动机。然后在实验室中对该设计进行了实现和验证。类似的技术也被用于在燃烧前对火箭燃料进行压缩，对该技术进行整体优化可能会带来更便宜的太空旅行。

0072191BirnirIn a program of analytical and computational investigations, the investigator will develop control theory to make jet engines lighter, more efficient and safer. Surge and stall are instabilities in the flow of air through the engines; flutter is an oscillation of the blades compressing the air. These instabilities decrease the efficiency of the engine and can be dangerous. The control theory aims at controlling all of these instabilities.If lighter, more fuel efficient and safer aircraft engines are to be made the current technology needs to be improved. This research tries to accomplishes this goal by first developing a mathematical model for the jet engine, then simulating this model of the engine on a computer and using the results to figure out how to design a much more efficient and safer jet engine. Then this design is implemented and checked in the laboratory. Similar technology is also used to compress rocket fuel before combustion and an optimization of the technology as a whole may lead to cheaper space travel.