Effects of thermal stratification on detonation development in hypersonic reactive flows
文献类型：期刊论文
| 作者 | Yang PF(杨鹏飞)3,4 ; Yu DH(于德海)3,4; Chen, Zheng3; Teng, Honghui2; Ng, Hoi Dick1
|
| 刊名 | PHYSICAL REVIEW FLUIDS
 |
| 出版日期 | 2024-08-09 |
| 卷号 | 9期号:8页码:18 |
| ISSN号 | 2469-990X |
| DOI | 10.1103/PhysRevFluids.9.083202 |
| 通讯作者 | Teng, Honghui(hhteng@bit.edu.cn) |
| 英文摘要 | Gaseous detonation waves in a uniform mixture have been studied widely, but uniformity is seldom realized in practical applications such as detonation-based engines. Nonideal scenarios involving incomplete mixing and curved intake compression lead to the thermal stratification of reactants. Local high-temperature regions first trigger the reactant autoignition and even result in the untimely formation of a detonation wave. Using the two-dimensional Euler equations and a detailed H2-air reaction mechanism, we examine the effects of reactant thermal stratification on the autoignition wave morphology in hypersonic reactive flows. Three flow regimes, namely, the autoignition-driven reaction front, detonation wave, and decoupling shock/reaction front, are observed. These flow regimes are determined by the temperature gradient, and only a moderate temperature gradient can trigger an oblique detonation wave. The oblique detonation can stabilize in hypersonic inflows, primarily because the upstream autoignition region acts as an anchorage point. Comparisons of one- and two-dimensional autoignitions confirm that supersonic flow enhances the formation of pressure waves. An analysis of the reaction front propagation speeds reveals that the detonation development is determined by two aspects. One is the convergence of compression waves originating from thermal expansion and supersonic flows, and another is the reaction front propagation speed at the early stage, which must exceed the local sound speed to promote positive feedback between pressure waves and heat release. |
| 分类号 | 二类 |
| WOS关键词 | HOT-SPOT ; IGNITION ; AUTOIGNITION ; PROPAGATION |
| 资助项目 | National Natural Science Foundation of China[12202014] ; National Natural Science Foundation of China[12325206] ; National Natural Science Foundation of China[52176096] ; National Natural Science Foundation of China[52006001] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001290929000001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Teng, Honghui |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96325]  |
| 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.Concordia Univ, Dept Mech Ind & Aerosp Engn, Montreal, PQ H3G 1M8, Canada 2.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China; 3.Peking Univ, Coll Engn, Beijing 100871, Peoples R China; 4.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 | Yang PF,Yu DH,Chen, Zheng,et al. Effects of thermal stratification on detonation development in hypersonic reactive flows[J]. PHYSICAL REVIEW FLUIDS,2024,9(8):18. |
| APA | 杨鹏飞,于德海,Chen, Zheng,Teng, Honghui,&Ng, Hoi Dick.(2024).Effects of thermal stratification on detonation development in hypersonic reactive flows.PHYSICAL REVIEW FLUIDS,9(8),18. |
| MLA | 杨鹏飞,et al."Effects of thermal stratification on detonation development in hypersonic reactive flows".PHYSICAL REVIEW FLUIDS 9.8(2024):18. |
入库方式： OAI收割
来源：力学研究所
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