The Phenomena of Flame Propagation in a Cylindrical Combustion Chamber with a Swirling Mixture

2000 ◽  
Author(s):  
Andrzej Gorczakowski ◽  
Jozef Jarosinski
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation

Experimental observations of turbulent flame propagation effected by flame acceleration in the end gas of closed combustion chamber

Fuel ◽  
2016 ◽  
Vol 180 ◽  
pp. 157-163 ◽  
Author(s):  
Haiqiao Wei ◽  
Dongzhi Gao ◽  
Lei Zhou ◽  
Jiaying Pan ◽  
Kang Tao ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation ◽  
Turbulent Flame ◽  
Flame Acceleration

Homogeneous charge compression ignition engine-out emission-does flame propagation occur in homogeneous charge compression ignition?

2002 ◽  
Vol 3 (4) ◽  
pp. 185-195 ◽  
Author(s):  
E. W. Kaiser ◽  
J Yang ◽  
T Culp ◽  
N Xu ◽  
M. M. Maricq
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation ◽  
Homogeneous Charge Compression Ignition ◽  
Carbon Oxide ◽  
Injection Timing ◽  
Particulate Emissions ◽  
Compression Ignition ◽  
Hcci Engine ◽  
Hc Emissions ◽  
Homogeneous Charge

Engine-out emissions data [CO, CO2, speciated hydrocarbons (HC), and particulate matter (size and number density)] were obtained from a single-cylinder, 660 cm3, homogeneous charge compression ignition (HCCI) engine operated on gasoline fuel using direct in-cylinder injection. Data were taken as functions of the air-fuel ratio (A/F) (30–270), r/min, inlet air temperature and fuel injection timing. Three important observations were made A sharp break occurs in the CO and CO2 emissions indices beginning near A/F = 75. Above A/F ∼ 100, CO is the primary carbon oxide while for A/F < 70, CO2 is the major carbon oxide. The HC emissions index increases linearly, beginning near A/F ∼ 30:1. Below this A/F, the HC index is characteristic of crevice emissions (∼ 3.5 per cent). These results do not prove this unequivocally, but can be explained by a mechanism in which, for A/F < 75, flame propagation occurs over relatively short distances between the multiple autoignition sites within the combustion chamber. Adiabatic compression calculations indicate that for A/F < 75, the compression temperature (∼ 1150 K) is sufficiently high to support flame propagation. The linear increase in HC emissions above that expected from crevice storage can be explained by noting that autoignition becomes more difficult as the A/F becomes leaner and fewer ignition sites are likely to exist within the combustion chamber, reducing the amount of fuel combusted. Conventional models of HCCI combustion involving multi-zone autoignition may also explain the data, but the above concept is an alternative combustion mechanism for HCCI, which should be considered. Particulate emissions at moderate load from this HCCI engine, while much lower than from a diesel, are similar to those from early-injection DISI (direct injection spark ignition) engines and should not be assumed to be negligible.

Development of a three-dimensional knock simulation method incorporating a high-accuracy flame propagation model

2005 ◽  
Vol 6 (1) ◽  
pp. 73-83 ◽  
Author(s):  
A Teraji ◽  
T Tsuda ◽  
T Noda ◽  
M Kubo ◽  
T Itoh
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation ◽  
Turbulence Intensity ◽  
Engine Speed ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Propagation Model ◽  
General Tendency ◽  
Flamelet Model ◽  
Flame Kernel

Combustion in internal combustion (IC) engines involves very complicated phenomena (including flame propagation and knock), which are strongly affected by engine speed, load, and turbulence intensity in the combustion chamber. The aim of this study was to develop a flame propagation model and a knock prediction technique applicable to various engine operating conditions, including engine speed and in-cylinder turbulence intensity. A new flame propagation model, the universal coherent flamelet model (UCFM) has been developed that improves the coherent flamelet model (CFM) by considering flame growth both in terms of the turbulent flame kernel and laminar flame kernel. A knock prediction model was developed by implementing the Livengood-Wu integral as the autoignition model in the flame propagation model. The combined model allows evaluation of both where and when autoignition occurs in a real shape combustion chamber. A comparison of the measured and calculated time for the occurrence of knock shows good agreement for various operating conditions. The three-dimensional calculation results indicate the general tendency for the location where autoignition occurs in the combustion chamber and the effect of the spark plug position on the occurrence of knock.

scholarly journals Effect of Pre-Combustion Chamber Nozzle Parameters on the Performance of a Marine 2-Stroke Dual Fuel Engine

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 876 ◽  
Author(s):  
Hao Guo ◽  
Song Zhou ◽  
Majed Shreka ◽  
Yongming Feng
Keyword(s):  
Combustion Chamber ◽  
Flame Propagation ◽  
High Efficiency ◽  
Great Influence ◽  
Engine Performance ◽  
Propagation Speed ◽  
Nozzle Diameter ◽  
Dual Fuel ◽  
Shipping Industry ◽  
Reduce Emissions

In recent years and with the increasing rigor of the International Maritime Organization (IMO) emission regulations, the shipping industry has focused more on environment-friendly and efficient power. Low-pressure dual-fuel (LP-DF) engine technology with high efficiency and good emissions has become a promising solution in the development of marine engines. This engine often uses pre-combustion chamber (PCC) to ignite natural gas due to its higher ignition energy. In this paper, a parametric study of the LP-DF engine was proceeded to investigate the design scheme of the PCC. The effect of PCC parameters on engine performance and emissions were studied from two aspects: PCC nozzle diameter and PCC nozzle angle. The results showed that the PCC nozzle diameter affected the propagation of the flame in the combustion chamber. Moreover, suitable PCC nozzle diameters helped to improve flame propagation stability and engine performance and reduce emissions. Furthermore, the angle of the PCC nozzle had a great influence on flame propagation direction, which affected the flame propagation speed and thus the occurrence of knocking. Finally, optimizing the angle of the PCC nozzle was beneficial to the organization of the in-cylinder combustion.

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