Experimental study on combustion characteristics of blended fuel pool fires

2019 ◽  
Vol 37 (3) ◽  
pp. 236-256 ◽  
Author(s):  
Xuehui Wang ◽  
Tiannian Zhou ◽  
Qinpei Chen ◽  
Junjiang He ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Volatile Component ◽  
Combustion Characteristics ◽  
Boiling Temperature ◽  
Flame Height ◽  
Distribution Model ◽  
Pool Fires ◽  
Burning Process ◽  
Fuel Blends ◽  
Axial Temperature ◽  
Blended Fuel

Liquid–vapor phase equilibrium theories are used to analyze boiling processes of blended fuel pool fires, and the results show that there are two boiling mechanisms (azeotropism and non-azeotropism) for blended fuels compared with single-component fuels. A series of pool fire experiments were conducted to investigate the combustion characteristics of blended fuel pool fires. The experimental results showed that the two boiling mechanisms have different effects on the burning process of the fuel blends. The boiling temperature and composition varied for the non-azeotropic blends during the burning process and remained steady for azeotropic blends. Furthermore, the boiling temperature of azeotropic blends is lower than that of its components and ranges from a specific temperature to the boiling point of the less volatile component. The flame radiant fraction of the azeotropic blend was also relatively constant during the burning process, whereas that of the non-azeotropic blend varied in different stages of the burning process. Heskestad’s flame height model and flame axial temperature distribution model are applicable for pool fires of azeotropic and non-azeotropic blends.

In-depth analysis of burning process of binary blended fuel pool fires based on liquid–vapor equilibria

Fuel ◽  
2019 ◽  
Vol 256 ◽  
pp. 115918 ◽  
Author(s):  
Xuehui Wang ◽  
Qinpei Chen ◽  
Tiannian Zhou ◽  
Haihang Li ◽  
Chao Ding ◽  
...  
Keyword(s):  
Pool Fires ◽  
Burning Process ◽  
Depth Analysis ◽  
Blended Fuel ◽  
Liquid Vapor

Burning Characteristics of Azeotropic Binary Blended Fuel Pool Fire

2018 ◽  
Vol 775 ◽  
pp. 365-370 ◽  
Author(s):  
Xue Hui Wang ◽  
Tian Nian Zhou ◽  
Q.P. Chen ◽  
Jin Fei Zhao ◽  
Chao Ding ◽  
...  
Keyword(s):  
Burning Rate ◽  
Binary Mixtures ◽  
Pool Fires ◽  
Fuel Temperature ◽  
Flame Radiation ◽  
Burning Process ◽  
Proportional Relation ◽  
Result Show ◽  
Series Of Experiments ◽  
Blended Fuel

A series of experiments were conducted to investigate the burning characteristics of blended fuel pool fires. The azeotropic binary mixtures blended by ethanol and n-Heptane were selected as blended fuel in experiment. The fuel temperature, fire behaviors, burning rate and flame radiation were recorded in experiments. The result show that azeotropism play an important role in the burning process, the fuel temperature was decrease and the burning rate was increased. The flame radiant fraction of azeotrope has proportional relation with the radiation faction of component.

Effect of Ethanol–Diesel Fuel Blends on Autoignition and Combustion Characteristics in HCCI Engines

2017 ◽  
Vol 17 (17th International Conference) ◽  
pp. 1-15
Author(s):  
Aly Elzahaby ◽  
Medhat Elkelawy ◽  
Hagar Bastawissi ◽  
Saad El-Malla ◽  
Abdel Moneim Naceb
Keyword(s):  
Diesel Fuel ◽  
Combustion Characteristics ◽  
Fuel Blends ◽  
Hcci Engines

An Experimental Study of the Interaction of Multiple Liquid Pool Fires

1995 ◽  
Vol 117 (1) ◽  
pp. 37-42 ◽  
Author(s):  
J. R. Vincent ◽  
S. R. Gollahalli
Keyword(s):  
Carbon Dioxide ◽  
Large Fraction ◽  
Liquid Pool ◽  
Flame Height ◽  
Design Parameters ◽  
Pool Fires ◽  
Pool Surface ◽  
Flammable Liquids ◽  
Liquid Pools ◽  
Ignition And Combustion

The risk of accidental spills and possible fires is high in the storage and handling of large quantities of flammable liquids. Such liquid pool fires are generally buoyancy-driven and emit a large fraction of their heat release in the form of radiation. Ignition and combustion characteristics of liquid pools depend on the design parameters such as diameter, spacing, and shape of the pools. This laboratory scale study was conducted to determine the effects of these parameters on the characteristics of multiple liquid pool fires. The measurements reported include pool surface regression rate, flame height, temperature, and concentrations of carbon dioxide, soot, and oxygen.

Towards a High-Pressure Microchannel Reactor for Fuel Characterization

2021 ◽  
Author(s):  
David Akinpelu ◽  
Ingmar Schoegl
Keyword(s):  
High Pressure ◽  
Oxygen Concentration ◽  
Combustion Characteristics ◽  
Test Time ◽  
Potential Candidate ◽  
Microchannel Reactor ◽  
Transportation Fuels ◽  
Intermediate Pressure ◽  
Fuel Blends ◽  
The Impact

Abstract Within the area of combustion, externally heated microtubes have been introduced to study the combustion characteristics of fuels and fuel blends. Microreactors have advantages over other conventional fuel testing methods because of their potential to test small volumes (< 20 μl) at high throughput. In this work, a high-pressure microreactor is designed and implemented to test fuels up to a pressure of 20 bar where automated testing reduces test time substantially. The novelty of this device is its capability to operate at pressure exceeding the current state of the art of 12 bar. The combustion behavior of fuels is tested in an externally heated quartz tube, with a diameter less than the conventional quenching diameter of the fuel. The ultimate objective of the experiment is to investigate the impact of fuel on flame characteristics. The ability to reach engine relevant pressure conditions and its inherent small volume requirements make this device a potential candidate for measurements of laboratory transportation fuels and fuel blends. For initial validation, tests from an earlier intermediate pressure experiment with ethane/air and nitrogen mixtures are repeated. Chemiluminescence images are taken to evaluate the combustion characteristics in terms of the three classical flame regimes: weak flames, Flames with Repetitive Extinction, and Ignition (FREI) and normal flames. Previous results at intermediate pressure showed that as the pressure increases, the weak flame and FREI regimes shift towards lower velocities. Also, as dilution level increase (i.e. reducing oxygen concentration), the transition from the weak flame to FREI becomes less abrupt and is completely lost for marginal oxygen concentration. The objective of this study is to document flame dynamics at higher pressures.

Analysis of combustion characteristics, engine performances and emissions of long-chain alcohol-diesel fuel blends

Fuel ◽  
2018 ◽  
Vol 220 ◽  
pp. 682-691 ◽  
Author(s):  
Hazrulzurina Suhaimi ◽  
Abdullah Adam ◽  
Anes G. Mrwan ◽  
Zuhaira Abdullah ◽  
Mohd. Fahmi Othman ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Combustion Characteristics ◽  
Chain Alcohol ◽  
Fuel Blends ◽  
Long Chain Alcohol ◽  
Long Chain

scholarly journals Influence of Different Low Air Pressure on Combustion Characteristics of Ethanol Pool Fires

2013 ◽  
Vol 62 ◽  
pp. 226-233 ◽  
Author(s):  
Cuipeng Kuang ◽  
Yuanzhou Li ◽  
Shi Zhu ◽  
Jian Li
Keyword(s):  
Combustion Characteristics ◽  
Air Pressure ◽  
Pool Fires

Spray and Combustion Characteristics of Biodiesel∕Diesel Blended Fuel in a Direct Injection Common-Rail Diesel Engine

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Hyun Kyu Suh ◽  
Hyun Gu Roh ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Injection Rate ◽  
Combustion Characteristics ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Pilot Injection ◽  
Blended Fuel ◽  
Conventional Diesel Fuel

The aim of this work is to investigate the effect of the blending ratio and pilot injection on the spray and combustion characteristics of biodiesel fuel and compare these factors with those of diesel fuel in a direct injection common-rail diesel engine. In order to study the factors influencing the spray and combustion characteristics of biodiesel fuel, experiments involving exhaust emissions and engine performance were conducted at various biodiesel blending ratios and injection conditions for engine operating conditions. The macroscopic and microscopic spray characteristics of biodiesel fuel, such as injection rate, split injection effect, spray tip penetration, droplet diameter, and axial velocity distribution, were compared with the results from conventional diesel fuel. For biodiesel blended fuel, it was revealed that a higher injection pressure is needed to achieve the same injection rate at a higher blending ratio. The spray tip penetration of biodiesel fuel was similar to that of diesel. The atomization characteristics of biodiesel show that it has higher Sauter mean diameter and lower spray velocity than conventional diesel fuel due to high viscosity and surface tension. The peak combustion pressures of diesel and blending fuel increased with advanced injection timing and the combustion pressure of biodiesel fuel is higher than that of diesel fuel. As the pilot injection timing is retarded to 15deg of BTDC that is closed by the top dead center, the dissimilarities of diesel and blending fuels combustion pressure are reduced. It was found that the pilot injection enhanced the deteriorated spray and combustion characteristics of biodiesel fuel caused by different physical properties of the fuel.

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