超音速射流中煤油喷雾燃烧的大涡模拟

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-03-27 DOI:10.1016/j.ast.2025.110164

Florian Kissel, Guillaume Ribert, Pascale Domingo

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引用次数: 0

摘要

采用大涡模拟方法研究了与未来超燃冲压发动机发展有关的高速反应两相流。目前的结构是受到超音速Cheng燃烧器的启发，用气态或液态的煤油代替氢。超音速煤油喷射被热空气的超音速共流包围，确保喷射火焰的稳定。燃烧器的全局等效设置为0.5。将文献中包含19种和54种反应的5种整体机制和更详细的机制与包含18种和29种反应的新优化化学进行比较。讨论了点火延迟和液滴尺寸对火焰稳定动力学和燃烧模式的影响。对源项进行子网格闭合的必要性进行了评估。无论煤油相如何，火焰结构都以非预混燃烧状态为主，即使检测到丰富的预混状态也有不可忽略的贡献。

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Large-Eddy Simulations of kerosene spray combustion in a supersonic jet flow

High-speed reactive two-phase flows, relevant for the development of future scramjet engines, are studied by Large-Eddy Simulations. The present configuration is inspired by the supersonic Cheng's burner replacing hydrogen with kerosene in the gaseous or liquid phase. The sonic kerosene injection is surrounded by a supersonic co-flow of hot vitiated air, ensuring a jet flame's stabilization. The global equivalence of the burner is set to 0.5. A 5-species global mechanism and a more detailed mechanism from the literature involving 19 species and 54 reactions are compared with a new optimized chemistry involving 18 species and 29 reactions. The impact of ignition delay and droplet size on flame stabilization dynamics and combustion modes is discussed. The necessity of a sub-grid closure for the source terms is assessed. Whatever the kerosene phase, the flame structure is dominated by the non-premixed combustion regime, even if a non-negligible contribution of the rich premixed regime is detected.

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.