Rigorous Characterization, Modelling, and Mitigation of Aeroengine Response to Inlet Flow Distortion

航空发动机对进气流量畸变响应的严格表征、建模和缓解

• 批准号: RGPIN-2015-06181
• 负责人: Defoe, Jeffrey
• 金额: $ 1.6万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=678866
• 关键词: Rigorous; Characterization; Modelling; Mitigation; Aeroengine

This proposal aims to improve the sustainability of aviation by addressing challenges to realizing commercial aircraft with advanced, embedded propulsion systems. Embedded propulsion systems use jet engines integrated into the fuselage of the aircraft rather than hung from the wings. In such a configuration, fuel consumption could be reduced by up to 4%. This corresponds to a possible annual savings of up to $238 million for Canadian airlines alone. Worldwide, use of embedded propulsion systems could reduce carbon dioxide emissions by up to 28 million tonnes annually.****This type of engine configuration is not used in modern commercial aircraft due to major challenges associated with its implementation. These centre around the fact that in such a configuration, the airflow entering the engine(s) is by necessity non-uniform, having variations in velocity and pressure. This makes it challenging to design an engine whose efficiency will match that achieved in a conventional below-the-wing configuration. In particular, the fan at the front of the engine must deal with the flow non-uniformities.***The work described in this proposal will address two aspects of this challenge.***First, a systematic study of the manner in which these airflow non-uniformities affect the performance of jet engine fans will be undertaken. While many studies in the past have looked at a small number of specific test cases, no studies have had the scope to extract general trends which can be used to help engine designers. This is the aim of the proposed work.***Second, innovative simplified models of the engine fan will be developed which accurately capture the effects of the non-uniform incoming airflow. These are important because it is not possible to properly account for the effects of the non-uniform airflow early on in the design process unless accurate simplified models are available. In addition, the existence of such models will enable the fan to be designed to have specific performance characteristics in the presence of non-uniform airflow, rather than just predicting how a certain fan design will behave.***It is expected that these two investigations will lead to new insight into how embedded propulsion systems can be designed to achieve the largest possible reduction in fuel use. Computer simulations and experiments will be used to test out design ideas and determine how much impact they will have in practice.***This work is relevant to the aviation industry in Canada and worldwide. Engine manufacturers such as Pratt and Whitney Canada as well as aircraft manufacturers like Bombardier Aerospace should be interested in the results of this work. Beyond Canada, other engine and aircraft manufacturers as well as academics working in related fields should also find the work of interest. The outcomes should make important progress towards making the use of embedded propulsion systems, and the accompanying fuel consumption reduction, a reality.

该提案旨在通过应对实现先进的，嵌入式推进系统的商业飞机的挑战来提高航空的可持续性。嵌入式推进系统使用集成到飞机机身的喷气发动机，而不是从机翼上悬挂。在这种配置中，燃料消耗可降低多达4％。这对应于仅加拿大航空公司的年度节省最高可达2.38亿加元。在全球范围内，使用嵌入式推进系统可以每年将二氧化碳排放量减少多达2800万吨。****由于与实施相关的重大挑战，现代商用飞机中不使用这种发动机配置。这些围绕这样一个事实，即在这种配置中，进入发动机的气流是必需的不均匀性，具有速度和压力的变化。这使设计发动机的效率将与传统的翼型配置相匹配，这使其具有挑战性。特别是，发动机前部的风扇必须处理流动不均匀性。***本提案中描述的工作将解决此挑战的两个方面。尽管过去的许多研究都研究了少数特定的测试用例，但没有研究范围来提取一般趋势，可用于帮助发动机设计师。这是拟议的工作的目的。这些很重要，因为除非有准确的简化模型，否则不可能在设计过程中早期正确考虑非均匀气流的影响。此外，这种模型的存在将使风扇的设计在存在非均匀气流的情况下具有特定的性能特征，而不仅仅是预测某个风扇设计将如何表现。计算机模拟和实验将用于测试设计思想，并确定他们在实践中的影响。***这项工作与加拿大和全球的航空业有关。 Pratt和Whitney Canada等发动机制造商以及像Bombardier Aerospace这样的飞机制造商应该对这项工作的结果感兴趣。除了加拿大，其他发动机和飞机制造商以及在相关领域工作的学者也应该找到感兴趣的工作。结果应在利用嵌入式推进系统以及随附的减少燃油消耗（现实）方面取得重要进展。