漩涡几何形状对模型燃气轮机燃烧器出口温度曲线性能的影响

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS
Chaowei Tang , Qian Yao , Wu Jin , Jianzhong Li , Yisheng Yan , Li Yuan
{"title":"漩涡几何形状对模型燃气轮机燃烧器出口温度曲线性能的影响","authors":"Chaowei Tang ,&nbsp;Qian Yao ,&nbsp;Wu Jin ,&nbsp;Jianzhong Li ,&nbsp;Yisheng Yan ,&nbsp;Li Yuan","doi":"10.1016/j.applthermaleng.2024.124946","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the impact of swirl numbers, swirl direction combinations, and recirculation zone geometries on outlet temperature distribution and combustion efficiency through numerical simulations using the standard k-ε turbulence model. The research focuses on how variations in swirl numbers and directions affect the formation of high-temperature zones, recirculation patterns, and overall combustor performance. The simulations demonstrate that an increase in the swirl number of the third swirler results in a shift of the local high-temperature zone towards the dome, whereas higher swirl numbers of the first and second swirlers amplify the temperature peak. When the second and third swirlers rotate in the same direction, recirculation occurs at the outlet, moving the high-temperature zone closer to the exit. A decrease in the number of fuel supply nozzles leads to a higher outlet temperature distribution factor (OTDF), while an increase in the number of nozzles enhances temperature distribution. The central recirculation zone significantly influences the outlet temperature of the combustor, with an optimal cold-state length-to-height ratio (L/H)<sub>n</sub> of approximately 1.2 and a reactive-state (L/H)<sub>r</sub>, of 2 improving temperature distribution. As the ratio decreases from 1.771 to 1.289, the OTDF decreases from 0.41 to 0.24. Higher swirl numbers increase combustion efficiency, with Case3 achieving 99.86%. Insufficient fuel–air mixing under low swirl conditions leads to incomplete combustion, whereas higher swirl numbers promote better mixing and efficiency. These findings provide a foundation for further advancements in high-performance aeroengine combustor design.</div></div>","PeriodicalId":8201,"journal":{"name":"Applied Thermal Engineering","volume":"260 ","pages":"Article 124946"},"PeriodicalIF":6.1000,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of swirler geometry on the outlet temperature profile performance of a model gas turbine combustor\",\"authors\":\"Chaowei Tang ,&nbsp;Qian Yao ,&nbsp;Wu Jin ,&nbsp;Jianzhong Li ,&nbsp;Yisheng Yan ,&nbsp;Li Yuan\",\"doi\":\"10.1016/j.applthermaleng.2024.124946\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the impact of swirl numbers, swirl direction combinations, and recirculation zone geometries on outlet temperature distribution and combustion efficiency through numerical simulations using the standard k-ε turbulence model. The research focuses on how variations in swirl numbers and directions affect the formation of high-temperature zones, recirculation patterns, and overall combustor performance. The simulations demonstrate that an increase in the swirl number of the third swirler results in a shift of the local high-temperature zone towards the dome, whereas higher swirl numbers of the first and second swirlers amplify the temperature peak. When the second and third swirlers rotate in the same direction, recirculation occurs at the outlet, moving the high-temperature zone closer to the exit. A decrease in the number of fuel supply nozzles leads to a higher outlet temperature distribution factor (OTDF), while an increase in the number of nozzles enhances temperature distribution. The central recirculation zone significantly influences the outlet temperature of the combustor, with an optimal cold-state length-to-height ratio (L/H)<sub>n</sub> of approximately 1.2 and a reactive-state (L/H)<sub>r</sub>, of 2 improving temperature distribution. As the ratio decreases from 1.771 to 1.289, the OTDF decreases from 0.41 to 0.24. Higher swirl numbers increase combustion efficiency, with Case3 achieving 99.86%. Insufficient fuel–air mixing under low swirl conditions leads to incomplete combustion, whereas higher swirl numbers promote better mixing and efficiency. These findings provide a foundation for further advancements in high-performance aeroengine combustor design.</div></div>\",\"PeriodicalId\":8201,\"journal\":{\"name\":\"Applied Thermal Engineering\",\"volume\":\"260 \",\"pages\":\"Article 124946\"},\"PeriodicalIF\":6.1000,\"publicationDate\":\"2024-11-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Thermal Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1359431124026140\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359431124026140","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0

摘要

本研究通过使用标准 k-ε 湍流模型进行数值模拟,研究了漩涡数、漩涡方向组合和再循环区几何形状对出口温度分布和燃烧效率的影响。研究重点是漩涡数量和方向的变化如何影响高温区的形成、再循环模式以及燃烧器的整体性能。模拟结果表明,增加第三个漩涡器的漩涡数会导致局部高温区向圆顶移动,而增加第一个和第二个漩涡器的漩涡数则会放大温度峰值。当第二和第三漩涡器同向旋转时,出口处会出现再循环,使高温区更靠近出口。供油喷嘴数量的减少会导致出口温度分布系数(OTDF)升高,而喷嘴数量的增加则会改善温度分布。中央再循环区对燃烧器的出口温度有很大影响,最佳冷态长高比(L/H)n 约为 1.2,反应态长高比(L/H)r 为 2 可以改善温度分布。随着长高比从 1.771 降至 1.289,OTDF 从 0.41 降至 0.24。漩涡数越大,燃烧效率越高,案例 3 达到 99.86%。在低漩涡条件下,燃料与空气混合不充分会导致燃烧不完全,而较高的漩涡数则能促进混合,提高燃烧效率。这些发现为进一步推进高性能航空发动机燃烧器的设计奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of swirler geometry on the outlet temperature profile performance of a model gas turbine combustor
This study investigates the impact of swirl numbers, swirl direction combinations, and recirculation zone geometries on outlet temperature distribution and combustion efficiency through numerical simulations using the standard k-ε turbulence model. The research focuses on how variations in swirl numbers and directions affect the formation of high-temperature zones, recirculation patterns, and overall combustor performance. The simulations demonstrate that an increase in the swirl number of the third swirler results in a shift of the local high-temperature zone towards the dome, whereas higher swirl numbers of the first and second swirlers amplify the temperature peak. When the second and third swirlers rotate in the same direction, recirculation occurs at the outlet, moving the high-temperature zone closer to the exit. A decrease in the number of fuel supply nozzles leads to a higher outlet temperature distribution factor (OTDF), while an increase in the number of nozzles enhances temperature distribution. The central recirculation zone significantly influences the outlet temperature of the combustor, with an optimal cold-state length-to-height ratio (L/H)n of approximately 1.2 and a reactive-state (L/H)r, of 2 improving temperature distribution. As the ratio decreases from 1.771 to 1.289, the OTDF decreases from 0.41 to 0.24. Higher swirl numbers increase combustion efficiency, with Case3 achieving 99.86%. Insufficient fuel–air mixing under low swirl conditions leads to incomplete combustion, whereas higher swirl numbers promote better mixing and efficiency. These findings provide a foundation for further advancements in high-performance aeroengine combustor design.
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
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信