Analysis and Control of Flow and Flutter in Aeroengines

航空发动机流动与颤振分析与控制

• 批准号: 0072191
• 负责人: Bjorn Birnir
• 金额: $ 10.98万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072191&HistoricalAwards=false
• 关键词: Analysis; Control; Flow; Flutter; Aeroengines

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.

[00:72191 . birnir1]在一个分析和计算研究项目中，研究人员将发展控制理论，使喷气发动机更轻、更高效、更安全。喘振和失速是通过发动机的气流的不稳定性；颤振是叶片压缩空气的振荡。这些不稳定性降低了发动机的效率，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、更安全的飞机发动机，目前的技术需要改进。本研究试图通过首先开发喷气发动机的数学模型来实现这一目标，然后在计算机上模拟该发动机模型，并利用结果来找出如何设计更高效、更安全的喷气发动机。然后在实验室中对该设计进行了实施和验证。类似的技术也被用于在燃烧前压缩火箭燃料，对该技术的整体优化可能会降低太空旅行的成本。