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Flow Control through Acoustic Excitation to Improve Future Aero-engine Performance

通过声激励进行流量控制以提高未来航空发动机的性能

基本信息

批准号：
2414471
负责人：
金额：
--
依托单位：
CRANFIELD UNIVERSITY
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2020
资助国家：
英国
起止时间：
2020 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2414471
关键词：
Flow Control through Acoustic Excitation

项目摘要

This is a fully funded PhD studentship within the Rolls-Royce University Technology Centre (UTC) in Aero Systems Design, Integration & Performance at Cranfield University, in the field of acoustic excitation and flow control. This PhD investigates the effects of acoustic excitation on high Reynolds number boundary layer flows, and the potential to improve the performance of future aero engines through flow control via acoustic excitation. This research programme spans for 3 years and is in close collaboration with Rolls-Royce plc (fully funded by Rolls-Royce and the EPSRC). Present civil aero engine components, such as intakes or low pressure compression systems, suffer from flow separation during various operating states across the flight envelope. Fundamental studies on flat plates and low-camber aerofoils have recognised that active flow control can be achieved via the re-energisation of separated boundary layers utilising acoustic waves of appropriate frequency and amplitude. This project will involve the quantification of the effects of any existing acoustic excitations on the performance of aero engine components, and will attempt to determine forced excitation requirements as a means of active flow control in gas turbine applications. The study will include amongst other:Fundamental research on the effects of acoustic excitation on shear flow characteristics.Development of reduced- and/or high-order models to quantify the impact of existing acoustic excitation on the performance of engine components of interest (intake, low pressure compression system, other).Development of reduced- and/or high-order models to identify any potential benefits on engine performance arising from the active control of separated flows via forced acoustic excitation.It is anticipated that the work will involve small-scale experimental investigations.

这是罗尔斯罗伊斯大学技术中心（UTC）在克兰菲尔德大学航空系统设计，集成和性能方面的全额资助博士生奖学金，在声学激励和流量控制领域。该博士研究声激励对高雷诺数边界层流动的影响，以及通过声激励进行流量控制来提高未来航空发动机性能的潜力。该研究计划为期3年，与劳斯莱斯公司密切合作（由劳斯莱斯和EPSRC完全资助）。目前的民用航空发动机部件，例如进气道或低压压缩系统，在飞行包线上的各种操作状态期间遭受流分离。对平板和低弯度翼型的基础研究已经认识到，通过利用适当频率和振幅的声波对分离的边界层进行再激励，可以实现主动流动控制。该项目将涉及任何现有的声激励对航空发动机部件性能的影响的量化，并将试图确定作为燃气涡轮机应用中主动流量控制手段的强制激励要求。该研究将包括：关于声激励对剪切流特性影响的基础研究。开发简化和/或高阶模型，以量化现有声激励对发动机相关部件（进气道、低压压缩系统等）性能的影响。开发简化和/或高阶模型，以确定通过强制声激励主动控制分离流对发动机性能产生的任何潜在益处。预计这项工作将涉及小规模的实验研究。