Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Numerical Simulations on Autoignition Propagation Modes under Reciprocating Engine-relevant Conditions | |
Pan, Jiaying1; Dong, Sheng1; Li, Tao2 ; He, Yu1; Wei, Haiqiao1; Jiang, Jie3
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| 2020-02-24 | |
| Source Publication | COMBUSTION SCIENCE AND TECHNOLOGY
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| ISSN | 0010-2202 |
| Pages | 18 |
| Corresponding Author | Wei, Haiqiao(whq@tju.edu.cn) |
| Abstract | Previous studies on autoignition propagation modes were often performed based on constant-volume configuration. However, the reactant mixture in reciprocating engines always experiences significant variable volume and ever-changing thermodynamic conditions, which may affect autoignition initiation and subsequent development during knocking combustion. In this study, the autoignition reaction wave propagation induced by thermal stratifications was investigated numerically, with addressing the role of reciprocating piston motion and primary flame compression. Compression heating was considered to emulate the compression and expansion caused by reciprocating piston motion, and different combustion boundary conditions and fuel properties were performed to investigate the impact on autoignition propagation modes. The results of hydrogen cases show that similar to constant-volume configurations, various autoignition propagation modes (including thermal explosion, detonation, and deflagration) can be observed. However, the normalized temperature gradients demarcating different autoignition propagation modes change significantly under variable thermodynamic conditions of reciprocating engines. Such an influence can also be embodied in engine combustion phasing. It is found that the intense autoignition involving detonation development prefers to occurring around the Top Dead Center with higher chemical reactivity and energy density. Furthermore, similar studies were further carried out for isooctane and the significant influence from reciprocating piston motion is still observed. Besides, it is found that almost all the autoignition events induced by thermal stratifications develop into deflagration rather than detonation for isooctane. The underlying reasons can be elucidated through the detonation peninsular diagrams for different fuels. |
| Keyword | Autoignition propagation mode reciprocating piston motion thermal stratification detonation development fuel property |
| DOI | 10.1080/00102202.2020.1732949 |
| WOS Keyword | REACTION FRONT PROPAGATION ; LOW-TEMPERATURE CHEMISTRY ; DETONATION DEVELOPMENT ; KNOCKING COMBUSTION ; FLAME PROPAGATION ; PRE-IGNITION ; DEFLAGRATION ; MECHANISMS ; GRADIENT ; LES |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51706152] ; National Natural Science Foundation of China[51825603] ; Natural Science Foundation of Tianjin City[18JCQNJC07500] ; National Key Research and Development Program of China[2017YFE0102800] |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering |
| Funding Organization | National Natural Science Foundation of China ; Natural Science Foundation of Tianjin City ; National Key Research and Development Program of China |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical |
| WOS ID | WOS:000515484800001 |
| Publisher | TAYLOR & FRANCIS INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/26523 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Wei, Haiqiao |
| Affiliation | 1.Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China 3.SINOPEC Res Inst Safety Engn, Qingdao, Peoples R China |
| Recommended Citation GB/T 7714 | Pan, Jiaying,Dong, Sheng,Li, Tao,et al. Numerical Simulations on Autoignition Propagation Modes under Reciprocating Engine-relevant Conditions[J]. COMBUSTION SCIENCE AND TECHNOLOGY,2020:18. |
| APA | Pan, Jiaying,Dong, Sheng,Li, Tao,He, Yu,Wei, Haiqiao,&Jiang, Jie.(2020).Numerical Simulations on Autoignition Propagation Modes under Reciprocating Engine-relevant Conditions.COMBUSTION SCIENCE AND TECHNOLOGY,18. |
| MLA | Pan, Jiaying,et al."Numerical Simulations on Autoignition Propagation Modes under Reciprocating Engine-relevant Conditions".COMBUSTION SCIENCE AND TECHNOLOGY (2020):18. |
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