Detonation Propagation in a Rotating Detonation Engine

旋转爆震发动机中的爆震传播

• 批准号: RGPIN-2019-04342
• 负责人: Ciccarelli, Gabriel
• 金额: $ 4.66万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=759844
• 关键词: Detonation; Propagation; Rotating; Engine

Aircraft turbo jet engines used for general aviation operate via constant pressure combustion following mechanical compression of the intake air. Thermodynamic cycle analysis shows that the cycle efficiency is higher if combustion proceeds via the detonation mode of combustion. Significant research effort has gone into developing a pulse-mode detonation engine, recent efforts world-wide have switched to the development of a Rotating Detonation Engine (RDE). RDEs are more compact and operate under steady conditions and therefore have less noise and vibration issues than their pulsed mode counterparts. In a RDE, the fuel and oxidizer are injected continuously into an annular combustion chamber through a matrix of holes on one end (the thrust wall). A detonation wave propagates around the annular combustor consuming the fuel as it enters the combustion chamber, and the combustion products expand out the open-end of the chamber producing thrust. Most research programs involve the design and testing of demonstration engines, where measurements are limited to combustion chamber pressure and detonation wave velocity. Although the importance of the fuel oxidizer mixing has been recognized, there has been very little experimental work done in this area. The objective of the proposed research program is to investigate the influence of the fuel-oxidizer mixing process on the stability and structure of the detonation wave in a single-shot, linear RDE. A linear RDE is essentially an unwrapped RDE that permits the use of state-of-the-art schlieren visualization and soot foil technique. These are techniques that have been perfected in my laboratory over the last decade in connection with industrial explosion safety research. This research is important because the direct visualization of the mixing and combustion will make it possible to optimize the fuel/air intake system design, which is the heart of the RDE. The outcomes of the research will be the development of a linear RDE that will be used to drive the design of prototype annular RDE. The experimental work will be supported by numerical simulations carried out using the open-source computational fluid dynamics (CFD) code OpenFoam. The linear RDE will be an important test facility that will produce valuable data for code development. The results from this project will be used by researchers around the world working on RDE development, both experimental and computational. HQP will be trained in the use of state-of-the-art visualization and computational techniques. The aerospace industry is interested in developing new compact efficient propulsion systems, and Canadian engine company subsidiaries such as Pratt and Whitney, Siemens, and GE would benefit from the advancement of this technology, as well as the aircraft constructor Bombardier. The Department of National Defence is keenly interested as they have entered a Technical Cooperation Program dealing with RDEs with Australia, UK, and the USA.

用于通用航空的飞机涡轮喷气发动机在进气机械压缩后通过恒压燃烧运行。热力学循环分析表明，采用爆震燃烧方式进行燃烧，循环效率较高。人们在开发脉冲式爆震发动机方面投入了大量的研究工作，最近全世界的努力都转向了旋转爆震发动机(RDE)的开发。RDES更紧凑，在稳定的条件下运行，因此与脉冲模式对应的设备相比，噪音和振动问题更少。在RDE中，燃料和氧化剂通过一端(推力壁)上的孔阵连续注入环形燃烧室。当燃料进入燃烧室时，爆震波在消耗燃料的环形燃烧室周围传播，燃烧产物从燃烧室的开口膨胀出来，产生推力。大多数研究项目涉及演示发动机的设计和测试，测量仅限于燃烧室压力和爆震波速度。尽管燃料氧化剂混合的重要性已被认识到，但在这一领域所做的实验工作很少。所提出的研究方案的目的是研究燃料-氧化剂混合过程对单发线性RDE中爆轰波稳定性和结构的影响。线性RDE本质上是一种展开的RDE，它允许使用最先进的纹影可视化和烟幕技术。在过去的十年里，我的实验室在工业爆炸安全研究方面已经完善了这些技术。这项研究很重要，因为混合和燃烧的直接可视化将使优化燃料/空气进气系统设计成为可能，而燃料/空气进气系统是RDE的核心。这项研究的成果将是开发一种线性RDE，用于驱动环形RDE原型的设计。实验工作将得到使用开源计算流体动力学(CFD)程序OpenFoam进行的数值模拟的支持。线性RDE将是一个重要的测试设施，将为代码开发产生有价值的数据。该项目的结果将被世界各地致力于RDE开发的研究人员使用，包括实验和计算。HQP将接受使用最先进的可视化和计算技术的培训。航空航天行业对开发新的紧凑型高效推进系统感兴趣，加拿大发动机公司的子公司，如普拉特和惠特尼、西门子和通用电气将从这项技术的进步中受益，飞机制造商庞巴迪也将受益。国防部对此非常感兴趣，因为他们已经与澳大利亚、英国和美国签订了一项处理RDEs的技术合作计划。