同轴分段燃烧室不同火焰模式下的动态特性分析

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-03-29 DOI:10.1016/j.ast.2025.110181

Yunjiao Shi , Jinghe Lu , Xiao Liu , Guangpu Lv , Enhui Liu , Hongtao Zheng

{"title":"同轴分段燃烧室不同火焰模式下的动态特性分析","authors":"Yunjiao Shi , Jinghe Lu , Xiao Liu , Guangpu Lv , Enhui Liu , Hongtao Zheng","doi":"10.1016/j.ast.2025.110181","DOIUrl":null,"url":null,"abstract":"<div><div>Gas turbines are extensively employed due to their high power output and rapid start-up capabilities. However, the growing demand for environmental protection has imposed increasingly stringent requirements on gas turbine performance. Among the technological advancements addressing these challenges, lean premixed combustion technology has gained widespread application for its ability to substantially reduce combustion temperatures, thereby mitigating harmful emissions. Specifically, in liquid-fueled combustors, the implementation of lean premixed prevaporization (LPP) technology offers a compact and lightweight design, making it particularly advantageous for use in aircraft engines. A low-emission, tower-type coaxial staged combustor incorporating a tower-type main combustion stage and utilizing LPP technology is simulated in this study. The flame structure, droplet distribution, temperature distribution, and flow field fluctuations under different loads are studied using large eddy simulation (LES) and the flamelet generated manifold (FGM) combustion model. Finally, the dynamic mode decomposition (DMD) method was used to analyze the spatial characteristics of the flame distribution. Results show that with the load changing, two flame modes: diffusion flame and partially premixed flame are observed within the combustor. The dynamic characteristics of the tower-staged coaxial combustor are significantly affected by the flame mode. As the combustor flame mode transitions from a diffusion flame to a partially premixed flame, the flame structure becomes more compact. This transition results in a decrease in CO emissions, while NO emissions increase significantly, with NO levels at the 0.35 load reaching nearly 20 times those observed at the 0.1 load. As the load increases, pressure fluctuations intensify, but overall they remain below 8‰ of the operating pressure, indicating relatively stable combustion. The amplitude distribution of different mode orders exhibits specific regional characteristics.</div></div>","PeriodicalId":50955,"journal":{"name":"Aerospace Science and Technology","volume":"162 ","pages":"Article 110181"},"PeriodicalIF":5.0000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic characteristics analysis under different flame modes in coaxial staged combustor\",\"authors\":\"Yunjiao Shi , Jinghe Lu , Xiao Liu , Guangpu Lv , Enhui Liu , Hongtao Zheng\",\"doi\":\"10.1016/j.ast.2025.110181\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Gas turbines are extensively employed due to their high power output and rapid start-up capabilities. However, the growing demand for environmental protection has imposed increasingly stringent requirements on gas turbine performance. Among the technological advancements addressing these challenges, lean premixed combustion technology has gained widespread application for its ability to substantially reduce combustion temperatures, thereby mitigating harmful emissions. Specifically, in liquid-fueled combustors, the implementation of lean premixed prevaporization (LPP) technology offers a compact and lightweight design, making it particularly advantageous for use in aircraft engines. A low-emission, tower-type coaxial staged combustor incorporating a tower-type main combustion stage and utilizing LPP technology is simulated in this study. The flame structure, droplet distribution, temperature distribution, and flow field fluctuations under different loads are studied using large eddy simulation (LES) and the flamelet generated manifold (FGM) combustion model. Finally, the dynamic mode decomposition (DMD) method was used to analyze the spatial characteristics of the flame distribution. Results show that with the load changing, two flame modes: diffusion flame and partially premixed flame are observed within the combustor. The dynamic characteristics of the tower-staged coaxial combustor are significantly affected by the flame mode. As the combustor flame mode transitions from a diffusion flame to a partially premixed flame, the flame structure becomes more compact. This transition results in a decrease in CO emissions, while NO emissions increase significantly, with NO levels at the 0.35 load reaching nearly 20 times those observed at the 0.1 load. As the load increases, pressure fluctuations intensify, but overall they remain below 8‰ of the operating pressure, indicating relatively stable combustion. The amplitude distribution of different mode orders exhibits specific regional characteristics.</div></div>\",\"PeriodicalId\":50955,\"journal\":{\"name\":\"Aerospace Science and Technology\",\"volume\":\"162 \",\"pages\":\"Article 110181\"},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2025-03-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Aerospace Science and Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1270963825002524\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, AEROSPACE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aerospace Science and Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1270963825002524","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, AEROSPACE","Score":null,"Total":0}

引用次数: 0

摘要

燃气轮机由于其高功率输出和快速启动能力而被广泛使用。然而，日益增长的环保需求对燃气轮机的性能提出了越来越严格的要求。在应对这些挑战的技术进步中，精益预混燃烧技术因其大幅降低燃烧温度从而减少有害排放的能力而获得了广泛的应用。具体来说，在液体燃料燃烧器中，精益预混预汽化（LPP）技术的实施提供了一个紧凑和轻量化的设计，使其在飞机发动机中的应用特别有利。本文对采用塔式主燃烧级并采用LPP技术的低排放塔式同轴分段燃烧室进行了仿真研究。采用大涡模拟（LES）和火焰生成流形（FGM）燃烧模型，研究了不同载荷下火焰结构、液滴分布、温度分布和流场波动。最后，采用动态模态分解（DMD）方法分析了火焰分布的空间特征。结果表明：随着负荷的变化，燃烧室内出现扩散火焰和部分预混火焰两种火焰模式。火焰模式对塔式同轴燃烧室的动态特性有重要影响。随着燃烧室火焰模式从扩散火焰过渡到部分预混火焰，火焰结构变得更加紧凑。这种转变导致CO排放量减少，而NO排放量显著增加，在0.35负荷下的NO水平达到0.1负荷时的近20倍。随着负荷的增加，压力波动加剧，但总体保持在工作压力的8‰以下，燃烧相对稳定。不同模态阶振幅分布具有特定的区域特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Dynamic characteristics analysis under different flame modes in coaxial staged combustor

Gas turbines are extensively employed due to their high power output and rapid start-up capabilities. However, the growing demand for environmental protection has imposed increasingly stringent requirements on gas turbine performance. Among the technological advancements addressing these challenges, lean premixed combustion technology has gained widespread application for its ability to substantially reduce combustion temperatures, thereby mitigating harmful emissions. Specifically, in liquid-fueled combustors, the implementation of lean premixed prevaporization (LPP) technology offers a compact and lightweight design, making it particularly advantageous for use in aircraft engines. A low-emission, tower-type coaxial staged combustor incorporating a tower-type main combustion stage and utilizing LPP technology is simulated in this study. The flame structure, droplet distribution, temperature distribution, and flow field fluctuations under different loads are studied using large eddy simulation (LES) and the flamelet generated manifold (FGM) combustion model. Finally, the dynamic mode decomposition (DMD) method was used to analyze the spatial characteristics of the flame distribution. Results show that with the load changing, two flame modes: diffusion flame and partially premixed flame are observed within the combustor. The dynamic characteristics of the tower-staged coaxial combustor are significantly affected by the flame mode. As the combustor flame mode transitions from a diffusion flame to a partially premixed flame, the flame structure becomes more compact. This transition results in a decrease in CO emissions, while NO emissions increase significantly, with NO levels at the 0.35 load reaching nearly 20 times those observed at the 0.1 load. As the load increases, pressure fluctuations intensify, but overall they remain below 8‰ of the operating pressure, indicating relatively stable combustion. The amplitude distribution of different mode orders exhibits specific regional characteristics.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

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.