Fuel temperature influence on spray and combustion characteristics in a constant volume combustion chamber (CVCC) under simulated engine operating conditions

Hwang, Joonsik; Park, Young-Soo; Bae, Choongsik; Lee, Jun Young; Pyo, Soonchan

doi:10.1016/j.fuel.2015.08.004

Cited by 48 publications

(11 citation statements)

References 23 publications

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“…Increasing injection pressure can increase the kinetic energy of the fuel which promotes friction between liquid and air resulting in breaking up. Compared with the results by Hwang et al., 32 it is obvious that the spray angle in marine diesel engine exhibits fewer changes according to the time and ranges from 16° to 19°, while the spray angle in general diesel engine ranges from 15° to 65°. This is because the larger nozzle in marine diesel engine changes the outlet flow pattern, which leads the fuel squirting along the axis of nozzle relatively, whereas the fuel is squirted divergently in general diesel engine.…”

Section: Resultscontrasting

confidence: 73%

“…Diesel droplets have larger kinetic energy to penetrate. The penetration in marine diesel engine exhibits higher value compared with that proposed by Hwang et al 32 It is necessary to consider the impingement on a wall when designing the cylinder. At the same time, the growth of penetration slows because of the energy loss caused by friction between the fuel and air.…”

Section: Influence Of Injection Pressure On Cavitation Flowmentioning

confidence: 91%

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Effects of injection pressure on cavitation and spray in marine diesel engine

Yan

Wang

et al. 2016

International Journal of Spray and Combustion Dynamics

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Numerical simulation of the cavitation and spray in a marine diesel engine is performed to investigate the effects of injection pressure on the cavitation flow and spray characteristics in the marine diesel engine, which in turn influence atomization and combustion in the cylinder. A two-phase flow model combined with single bubble dynamics and a droplet break-up model are used to simulate cavitation and spray, respectively, and the results are compared to the experimental data. With increasing injection pressure, the pressure fluctuations inside the nozzle become more intense. The spray penetration is proportional to time at the beginning of injection. Higher injection pressure increases the spray angle. In addition, massive structures on spray edge can return to the spray body, whereas the massive structures on the spray head remain unchanged throughout its lifetime. Each additional 20 MPa of injection pressure reduces the Sauter mean diameter by approximately 9%.

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Section: Resultscontrasting

confidence: 73%

Section: Influence Of Injection Pressure On Cavitation Flowmentioning

confidence: 91%

Effects of injection pressure on cavitation and spray in marine diesel engine

Yan

Wang

et al. 2016

International Journal of Spray and Combustion Dynamics

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“…Ma et al (2016) studied the effects of pentanol addition to diesel in different ratios on the spray and evaporation characteristics of the fuel in a constant volume chamber. In addition, there are a lot of experimental investigations about the evaporation, spray characteristics of liquid fuel at various cases (Hwang et al, 2015;Chen et al, 2016). However, the experiments are expensive and time-consuming, which restrict research process of the design and optimization of the internal combustion engine.…”

Section: Introductionmentioning

confidence: 99%

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Meng

Yan²,

Zhao

et al. 2019

JTST

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The fuel oil atomization is closely related to the combustion performance of the fuel in the internal combustion engine. However, during the oil atomization, the fast evaporating and moving oil droplets interact strongly with the surrounding gas, posing challenges towards the precise simulation of the combustion process. To precisely capture the interactions between fuel droplets and the surrounding gas, a new multi-droplets motion and evaporation model is deduced by introducing the local parameters surrounding the fuel droplets. The proposed model is validated comparing the simulation results against the experimental data of the containment spray process. Subsequently, the present model is adopted to simulate the fuel spray process in the typical constant volume bomb. The parameters evolution is presented during the course of the spray such as the gas temperature, droplet temperature, evaporating rate, velocity, radii variation, vapor concentration and air-fuel ratio. The analysis of the spray performance is conducted and the superiority of the new model is also discussed. The simulation analysis reveals that the spray droplets interact strongly with the surrounding gas; the developed droplet motion and evaporation model is advantageous in the simulation of the dense multi-droplets spray process.

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“…Hwang et al found that the variation of the fuel temperature may result in different injection delay. 24 Park et al claimed that the real start of injection was retarded and the real end of injection was advanced as the fuel temperature decreased. 25 Tat et al studied the influence of bulk modulus, which affects the sound speed in the fuel injection systems.…”

Section: Introductionmentioning

confidence: 99%

Effects of fuel temperature on injection performance of an EUP system

Liu

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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The fuel temperature has a great influence on the characteristics of an electronic unit pump (EUP) system, especially on the injection performance. This paper studies the regularity of the high-pressure fuel supply system performance at different fuel temperatures. The injection quantity, the injection rate, the fuel pressure, and the needle lift were measured by the EUP system test bench. Investigation results showed that, with the increase of fuel temperature, the injection quantity and maximum injection rate decreased, the time of start injection was delayed, and the peak fuel pressure value decreased. For the needle valve, as the temperature was raised its closing time was advanced at low speed conditions but delayed at high speed conditions. In addition, the empirical equations for the fuel temperature effects on the circulating fuel injection quantity and peak pressure are proposed by the experimental test and simulation data. This study will help to further apply and study the engine, and provide a reference for engine fuel supply control system design.

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Fuel temperature influence on spray and combustion characteristics in a constant volume combustion chamber (CVCC) under simulated engine operating conditions

Cited by 48 publications

References 23 publications

Effects of injection pressure on cavitation and spray in marine diesel engine

Effects of injection pressure on cavitation and spray in marine diesel engine

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Effects of fuel temperature on injection performance of an EUP system

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