Aerodynamic and thermo-acoustic stability analysis in a super-steady reactive flow
文献类型：期刊论文
| 作者 | Ren, Shoujun1,3; Tian, Bo2; Jones, William P.1; Wang, Xiaohan3 |
| 刊名 | FUEL
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 337页码:14 |
| 关键词 | Dynamics analysis Vortex-tube combustor Laminarization Momentum flux Burning velocity |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2022.127229 |
| 通讯作者 | Ren, Shoujun(rensj@ms.giec.ac.cn) |
| 英文摘要 | Aerodynamic and thermo-acoustic stability were systematically analyzed to reveal the underlying cause of the super-steady performance found in a strong rotating reactive flow, which is achieved using a stratified vortex-tube combustor (SVC) employing methanol as fuel. Results show that the SVC possesses a wide stability limit and weak pressure fluctuation with a uniform flame. The lean stability limit is always smaller than 0.2 and the amplitude of pressure fluctuation is generally within 2 kPa, indicating a super-steady combustion process. The large tangential velocity produces a large centrifugal force that suppresses the turbulent motion to promote aero-dynamic stability, yielding a small Froude number. The delay in the mixing process is the crucial reason for the generation of the stratified distribution of species and the triple-flame structure. The large transport fluxes of the species and enthalpy promote the reaction and ignition processes to intensify the combustion, which produces a large density gradient to promote thermo-acoustic stability. The large tangential velocity and density gradient result in a large Richardson number, suggesting the laminarization of the fluid. The momentum flux and its fluctuation decrease distinctly downstream of the vortex-flow because of the strong momentum exchange and transfer in the vortex flow, which weakens the pressure fluctuation in the post-flame zone. The intensified combustion can also increase the burning velocity, and promotes its matching with the flow field. The reduced momentum flux and the increased burning velocity are responsible for good thermo-acoustic stability. |
| WOS关键词 | LARGE-EDDY SIMULATION ; FLAME PROPAGATION ; SWIRLING FLOWS ; COMBUSTION ; MECHANISMS |
| 资助项目 | postdoctoral program of the International Training Program for Outstanding Young Scientific Research Talents of Guangdong Province of China ; Engineeringand Physical Sciences Research Council (EPSRC) through the UK Con-sortium on Turbulent Reactive Flow (UKCTRF)[EP/K025163/1] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000912278900001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | postdoctoral program of the International Training Program for Outstanding Young Scientific Research Talents of Guangdong Province of China ; Engineeringand Physical Sciences Research Council (EPSRC) through the UK Con-sortium on Turbulent Reactive Flow (UKCTRF) |
| 源URL | [http://ir.giec.ac.cn/handle/344007/38298]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Ren, Shoujun |
| 作者单位 | 1.Imperial Coll London, Dept Mech Engn, Exhibit Rd, London SW7 2AZ, England 2.Univ Leicester, Dept Engn, Univ Rd, Leicester LE1 7RH, England 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, Shoujun,Tian, Bo,Jones, William P.,et al. Aerodynamic and thermo-acoustic stability analysis in a super-steady reactive flow[J]. FUEL,2023,337:14. |
| APA | Ren, Shoujun,Tian, Bo,Jones, William P.,&Wang, Xiaohan.(2023).Aerodynamic and thermo-acoustic stability analysis in a super-steady reactive flow.FUEL,337,14. |
| MLA | Ren, Shoujun,et al."Aerodynamic and thermo-acoustic stability analysis in a super-steady reactive flow".FUEL 337(2023):14. |
入库方式： OAI收割
来源：广州能源研究所
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