Controlling Transcritical Thermoacoustic Interactions for Space Propulsion and Novel Energy Systems

控制空间推进和新型能源系统的跨临界热声相互作用

• 批准号: RGPIN-2016-04143
• 负责人: Hickey, JeanPierre
• 金额: $ 1.75万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638885
• 关键词: Controlling; Transcritical; Thermoacoustic; Interactions; Space

Rocket science can provide us with novel solutions to some of our modern–day energy concerns. Combustion instabilities in liquid rocket engines are one of the most important and challenging problems in space propulsion. These instabilities occur as the unsteady heat release of combustion couples with the acoustic modes in the combustion chamber; the complexity of this interaction is compounded by the highly non-linear, transcritical thermodynamic base state of the cryogenic propellants. The self-excited thermoacoustic coupling needs to be identified, as energetic build-up in the acoustic mode is the most important cause of catastrophic engine failure. However, this very serious challenge in the rocket propulsion community may actually prove to be a novel solution to some of our energy concerns, particularly in industrial settings. By carefully controlling the entropic-acoustic coupling, the energy created through this non-linear interaction may be harvested in a thermoacoustic heat engine to produce useful mechanical power, thus, permitting the efficient re-use of industrial waste heat.

火箭科学可以为我们解决一些现代能源问题提供新颖的解决方案。液体火箭发动机的燃烧不稳定性是太空推进中最重要和最具挑战性的问题之一。当燃烧的不稳定放热与燃烧室中的声学模式耦合时，就会出现这些不稳定性；低温推进剂的高度非线性、跨临界热力学基态加剧了这种相互作用的复杂性。需要识别自激热声耦合，因为声模式中的能量积聚是导致灾难性发动机故障的最重要原因。然而，火箭推进领域的这一非常严峻的挑战实际上可能被证明是解决我们一些能源问题的新颖解决方案，特别是在工业环境中。通过仔细控制熵-声耦合，通过这种非线性相互作用产生的能量可以在热声热机中收集，以产生有用的机械动力，从而允许有效地再利用工业废热。