Model Construction and Experiment Study of the Fuel Nucleus Boiling Process on Hot Surface

2013 ◽  
Vol 419 ◽  
pp. 3-9
Author(s):  
Bo Yun Liu ◽  
Hai Jian Qiu ◽  
Jin Shui Qiu ◽  
Xiang Lie Yi ◽  
Kang Bo Wang
Keyword(s):  
Comparative Analysis ◽  
Multiphase Flow ◽  
Mathematics Model ◽  
Evaporation Process ◽  
Experiment Study ◽  
Balance Condition ◽  
Boiling Process ◽  
Fuel Evaporation ◽  
Hot Surface ◽  
Boiling Mechanism

As for the nucleus boiling pattern of the fuel on hot surface, the nucleus boiling mechanism, evaporation process and gas-liquid balance condition have been analyzed. Based on the model of Euler multiphase flow, mathematics model of the nucleus boiling process has been constituted. Furthermore, the nucleus boiling process has been simulated by FLUENT. And then, the study provides the theoretic foundation for the forecast of the process of fuel evaporation on hot surface through the comparative analysis between the theoretic calculation conclusion and the experiment.

scholarly journals Measurement and Observation of Elementary Transition Boiling Process after Sudden Contact of Liquid with Hot Surface

2015 ◽  
Vol 105 ◽  
pp. 5-21 ◽  
Author(s):  
Yuichi Mitsutake ◽  
Suhaimi Illias ◽  
Koutarou Tsubaki ◽  
Mohammad Nasim Hasan ◽  
Masanori Monde
Keyword(s):  
Boiling Process ◽  
Elementary Transition ◽  
Hot Surface

Evaporation Time of Gasoline and Diesel Fuel Droplets on a Hot Plate: The Influence of Fuel Deposits

2008 ◽  
Author(s):  
P. Seers ◽  
V. Reguillet ◽  
E. Plamondon ◽  
L. Dufresne ◽  
S. Halle´
Keyword(s):  
Diesel Fuel ◽  
Droplet Evaporation ◽  
Evaporation Time ◽  
Plate Temperature ◽  
Diesel Fuels ◽  
Fuel Droplets ◽  
Initial Fuel ◽  
Property Changes ◽  
Fuel Evaporation ◽  
Hot Surface

The objective of this paper is to present experimental results of multicomponent fuel droplets impinging on a hot surface in order to quantify the influence of fuel build-up deposits on the evaporation time. The experiments were conducted with gasoline and diesel fuels to first obtain curves of evaporation time as a function of plate temperature. Based on these curves the Nukiyama and Leindenfrost temperatures were identified. In a second step, the effect of fuel deposit on the droplet evaporation time was studied. Based on the above evaporation time curves, plate temperatures were chosen as to offer a similar evaporation time but at temperatures below and above the Nukiyama and Leindenfrost temperatures respectively. This was done in order to isolate the effect of fuel deposits from the different evaporation mechanisms. The evaporation of successive impinging droplets was then measured. The results hence obtained indeed showed that the fuel deposit has a different impact on the evaporation time according the evaporating mechanism or equivalently the plate temperature. For plate temperatures lower than the Nukiyama temperature, gasoline and diesel fuel droplets showed an increase of their evaporation time as the amount of successive impinging droplets increased. The trend was reversed for plate temperatures above the Leindenfrost temperature. A hypothesis for this latter case is that the fuel deposit disrupts the vapor layer supporting the droplet and therefore provides a greater heat flux to the evaporating droplet. Finally, droplet evaporation times as a function of plate temperature were measured with an initial fuel deposit covering the plate. These results in turn showed that the global thermal diffusivity and porosity of the surface are changed by the presence of the fuel deposit. The consequence of these property changes are then shown to have a direct and global impact on the fuel evaporation time curves.

Study of Hot Surface Aviation Fuel Thermal Ignition Pattern

2014 ◽  
Vol 960-961 ◽  
pp. 332-336
Author(s):  
Bo Yun Liu ◽  
Min Lin Liu ◽  
Yan Hong Liu
Keyword(s):  
Reference Method ◽  
Aviation Fuel ◽  
Engineering Practice ◽  
Ignition Process ◽  
Thermal Ignition ◽  
Fire Engineering ◽  
Simulated Experiment ◽  
Ignition Mechanism ◽  
Fuel Evaporation ◽  
Hot Surface

Fuel evaporation and ignition process on the high-temperature hot surface are difficult to be predicted accurately. The rule of fuel evaporation and ignition delay that various with hot wall temperature have been obtained by utilizing the simulated experiment to study the evaporation and ignition process of aviation fuel on hot surface. This study complements the related content of the fuel ignition mechanism on hot wall,at the same, reference method for fuel fire engineering practice has been provided.

Boiling Pattern and Thermal Ignition Experiment Study of the Aviation Fuel on Hot Surface

2013 ◽  
Vol 419 ◽  
pp. 616-622
Author(s):  
Hai Jian Qiu ◽  
Jin Shui Qiu ◽  
Bo Yun Liu ◽  
Xiang Lie Yi ◽  
Kang Bo Wang
Keyword(s):  
Reference Method ◽  
Aviation Fuel ◽  
Engineering Practice ◽  
Ignition Process ◽  
Thermal Ignition ◽  
Fire Engineering ◽  
Simulated Experiment ◽  
Ignition Mechanism ◽  
Fuel Evaporation ◽  
Hot Surface

This study was intended to solve the problem that fuel evaporation and ignition process on the high-temperature hot surface are difficult to be predicted accurately. The rule of fuel evaporation and ignition delay that various with hot wall temperature have been obtained by utilizing the simulated experiment to study the evaporation and ignition process of aviation kerosene on horizontal hot wall. This study not only complements the related content of the fuel ignition mechanism on hot wall but also provides reference method for the fuel fire engineering practice.

scholarly journals PENGARUH UKURAN ATOMISASI BAHAN BAKAR TERHADAP UNJUK KERJA MOTOR BAKAR

POROS ◽  
2018 ◽  
Vol 15 (2) ◽  
pp. 92
Author(s):  
Abrar Riza ◽  
Hansel Hansel ◽  
Harto Tanujaya
Keyword(s):  
Thermal Efficiency ◽  
Combustion Process ◽  
Engine Performance ◽  
Evaporation Process ◽  
Mixing Conditions ◽  
Rate Of Combustion ◽  
Evaporation Energy ◽  
Characteristic Features ◽  
Fuel Evaporation

Abstract: The size of droplet affects the evaporation of the fuel. The greater the size of droplet is also the energy of fuel evaporation. The evaporation energy is directly proportional to the size of the droplet and oxidation must be mixed homogeneously. Mixing conditions in the combustion process affect the rate of combustion. One of the conditions of combustion is the droplet to the vapor. The more perfect the evaporation process the better the combustion process. This study saw the success of combustion due to the size of droplet on the performance. The droplet produced by atomization in the form of liquid granules. The size of atomization is the determinant of burning success. The four-stroke Otto engine performance depends on the size of the atomization in order to mix well with the oxidant during combustion process. The results of the research characteristic of the machine are due to the influence of the size of the droplet seen from the generated power, torque and thermal efficiency. Characteristic features increase with decreasing the size of the droplet. Torque increased 7.9%, power generated increased 7%, and thermal efficiency increased up to 7.3%. The results of this study show size of the droplet can improve the performance of engine. 

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