An experimental investigation of super knock combustion mode using a one-dimensional constant volume bomb
An experimental investigation of super knock combustion mode using a one-dimensional constant volume bomb
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一维定容弹超爆震燃烧模式的实验研究
DOI：
10.1016/j.ijhydene.2014.11.132
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发表时间：
2015-02
影响因子：
7.2
通讯作者：
Yizhou Jiang
中科院分区：
文献类型：
--
作者：
Yuliang Qi;Xin He;Zhi Wang;Jianxin Wang;Huiqiang Zhang;Yizhou Jiang
在高增压火花点火发动机中，由提前点火引起的超级爆震会导致非常高的高峰压力，这可能导致严重的发动机损坏。由于超级爆震的内在随机性，研究其机理比较困难，但超级爆震的高峰压力表明其可能与爆震有关。在这项研究中，一个管状的一维定容炸弹，简化了几何形状的真实的发动机的燃烧室附近的上止点，被用来更好地了解基本现象的超级爆震。采用H2/O2混合气在比真实的高增压发动机更低的压力下保持反应强度。采用高速阴影法和压力测量相结合的方法研究了初始压力和温度对燃烧模式和火焰传播的影响。通过对比增压发动机中的超爆压振荡频率和定容爆发器中的爆后压力波频率，可以发现超爆与爆轰之间的关系。实验结果还表明，H2/O2混合气在定容弹中的爆轰倾向随初始压力的增大而增大，随初始温度的增大而减小，表明混合气密度即能量密度对爆轰起燃起着重要作用。
Super knock induced by pre-ignition in highly boosted spark ignition engines can cause very high peak pressure, which may lead to severe engine damage. Although it is difficult to investigate the mechanism of super-knock due to its inherent randomness, the very high peak pressure implies that super knock may relate to detonation. In this study, a tube-like one-dimensional constant volume bomb, which simplifies the geometry of a real engine's combustion chamber near top dead center, was used to better understand the fundamental phenomenon underlying super knock. H2/O2mixture was used to maintain reaction intensity even at lower pressure than that in real highly boosted engines. Simultaneous high speed shadowgraphy and pressure measurement were conducted to study the effects of initial pressure and temperature on combustion mode and flame propagation. By comparing the frequencies of super knock pressure oscillation in the boosted engine and after-detonation pressure wave in the constant volume bomb, a relation can be found between the super knock and detonation. The experimental results also show that the detonation tendency of H2/O2mixture in the constant volume bomb increases with increasing initial pressure but decreases with increasing initial temperature, indicating that the mixture density i.e. energy density plays an important role in detonation onset.
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DOI：
10.4271/960827
发表时间：
1996-02
期刊：
SAE transactions
影响因子：
--
作者：
B. Stiebels;M. Schreiber;A. Sakak
通讯作者：
B. Stiebels;M. Schreiber;A. Sakak
DOI：
10.4271/902135
发表时间：
1990-10
期刊：
SAE transactions
影响因子：
--
作者：
G. Konig;C. Sheppard
通讯作者：
G. Konig;C. Sheppard
影响因子：
4.4
作者：
Ra, Youngchul;Reitz, Rolf D.
通讯作者：
Reitz, Rolf D.
影响因子：
1.2
作者：
Dahnz, Christoph;Han, Kyung-Man;Maas, Ulrich
通讯作者：
Maas, Ulrich
采用进气冲程两级喷射（TSII）抑制 TC-GDI 发动机的超级爆震
DOI：
10.1007/s11431-013-5374-3
发表时间：
2014
期刊：
Science in China - Series E: Technological Sciences
影响因子：
--
作者：
Wang, Zhi;Xu, Yaqi;Wang, Jianxin
通讯作者：
Wang, Jianxin