Oscillations in a circular scramjet combustor operating at different inflow total pressures
文献类型：期刊论文
| 作者 | Yu FY(于方游)2,3; Wang, Ziren1; Zhang, Xu3; Xu, Xiru1; Zhang QF(张启帆)3; Chen H(陈昊)3; Yue LJ(岳连捷)2,3 |
| 刊名 | APPLIED THERMAL ENGINEERING
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 280页码:9 |
| 关键词 | Scramjet Combustion oscillation Main frequency Different inflow total pressures |
| ISSN号 | 1359-4311 |
| DOI | 10.1016/j.applthermaleng.2025.128062 |
| 通讯作者 | Zhang, Qifan(zhangqifan@imech.ac.cn) ; Chen, Hao(chenhao@imech.ac.cn) |
| 英文摘要 | To better understand combustion unsteadiness in scramjets, a cavity-based circular combustor is experimentally studied at five total pressures, namely 0.76, 1.52, 2.54, 4.56, and 5.06 MPa, with the total temperature kept at 1578 K and the incoming Mach number 2.6 in all cases. The time-averaged pressure curves show that the cavity pressure, overall, rises with the incoming total pressure, and consequently, the shock train is pushed more upstream. But one more pressure peak appears after the total pressure reaches 5.06 MPa, reflecting a shift in the flow pattern. Severer pressure oscillations are also observed as the total pressure goes up, particularly for the part within the isolator, which signifies the behavior of the shock train and tends to increase faster in terms of the oscillatory amplitude. By contrast, the cavity-pressure oscillations weaken gradually till basically unchanged. Though different in amplitude trend, pressure signals in those two places always share a dominating frequency, which decreases constantly. To predict it more precisely, the classic frequency formula is improved based on one-dimensional analysis and experimental data, and the error is thus substantially reduced to 10%. |
| 分类号 | 一类 |
| WOS关键词 | ETHYLENE |
| 资助项目 | National Natural Science Foundation of China[12372236] ; National Natural Science Foundation of China[U2141220] ; National Natural Science Foundation of China[U2341240] ; National Natural Science Foundation of China[12302392] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001566164000006 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | 张启帆，陈昊 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103865]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Natl Key Lab Aerosp Flight Technol, Beijing 100074, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Yu FY,Wang, Ziren,Zhang, Xu,et al. Oscillations in a circular scramjet combustor operating at different inflow total pressures[J]. APPLIED THERMAL ENGINEERING,2025,280:9. |
| APA | 于方游.,Wang, Ziren.,Zhang, Xu.,Xu, Xiru.,张启帆.,...&岳连捷.(2025).Oscillations in a circular scramjet combustor operating at different inflow total pressures.APPLIED THERMAL ENGINEERING,280,9. |
| MLA | 于方游,et al."Oscillations in a circular scramjet combustor operating at different inflow total pressures".APPLIED THERMAL ENGINEERING 280(2025):9. |
入库方式： OAI收割
来源：力学研究所
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