Dynamic behavior of single droplet impacting on heptane pool with different depths

Fan, Xujun; Wang, Changjian; Li, Manhou; Chen, Bing; Wang, Xing; Zhang, Aifeng

doi:10.1016/j.euromechflu.2018.05.009

Cited by 8 publications

(4 citation statements)

References 41 publications

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“…As the WE increased from 175 to 440, a crater-jet appeared in the shallow pool, and a crater-jet-secondary jet appeared in the deep pool. When the WE exceeded 564, bubbles began to form (Fan et al, 2018). In addition, Lan and Wang (2014) used experimental and numerical simulation methods to study the impaction of a single water droplet on the heated wood…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Inhibition of the Wall-attached Fuel Combustion and the Formation of Aerosol Particle

Liu

Tang

et al. 2021

Aerosol Air Qual. Res.

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The wall-attached fuel layer of the combustor usually leads to an unstable combustion and produces an unexpected emission, such as aerosol particles and unburn hydrocarbons. In this study, the impaction of ethanol droplet on a heated liquid surface was examined for investigating the factors those could effectively control the fuel atomization and avoided the formation of wall-attached fuel layer. We accelerated the volatilization of ethanol droplets after contacting the liquid surface and even achieved the flash evaporation condition to burst the oil layer, which was conducive to cleaning the inner wall of the combustors and reducing emissions. A 3.12-mm ethanol droplet was used to impact a glycerol pool. The Weber number (WE, 303-1343) and pool temperature (T, 50-260℃) were two controlled parameters to explore the impaction characteristics. There were four typical phenomena observed, including surface dissolving, penetrating dissolution, vapor explosions, and nucleate boiling. Results showed that the maximum volume and surface area of the crater increased with the WE and the liquid pool temperature during impaction. Meanwhile, the boundary temperatures between the penetrating dissolution and the vapor explosion decreased. Additionally, the vapor explosion time increased with the WE but negatively correlated to the liquid pool temperature. The entire vapor explosion process was very short, lasting about 200 millisecond. Furthermore, the increasing WE had a negative effect on the nucleate boiling intensity when the liquid pool temperature significantly enhanced it. Consequently, the fuel droplet atomization and explosion could be sensitively controlled by varying the WE and the temperature of impaction surface. This finding provides valuable information to the designer of combustor control unit to

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Section: Accepted Manuscriptmentioning

confidence: 99%

“…When the WE is larger, a larger crater is generated (refer to Fig. 6) as well as a higher the jet (Fan et al, 2018;Manzello and Yang, 2002), so the formation and retraction of the crater and the rise and fall of the jet will take more time. Therefore, the explosion time increased as the WE increased.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Inhibition of the Wall-attached Fuel Combustion and the Formation of Aerosol Particle

Liu

Tang

et al. 2021

Aerosol Air Qual. Res.

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“…Zou et al [26,27] studied the phenomenon of water droplets impacting on the surface of restricted liquid, and found that with the increase in Weber number, water droplets could be observed to float, jump, condense, and splash. Fan et al [28] carried out the experiments on the single droplet impacting on heptane pool with the dimensionless depth from 1.8 to 10.8, and pointed out that there is a clear correlation between the impact behavior and the depth of the liquid pool. Penetration occurred when the dimensionless depth of less than 3.6, and crater-jet-secondary jet just could be seen when the dimensionless depth exceeded 5.4.…”

Section: Introductionmentioning

confidence: 99%

“…Although the impact behavior of single droplet onto miscible liquid has been extensively studied, [26,28,[30][31][32] the behavior and mechanism of droplet interaction with the immiscible liquid is still unclear, and especially the effect of oil pool temperature on the impact characteristic parameters have not been clarified. For obtaining insight into the interaction between water droplet and liquid surface at various temperatures and the fire extinguishing mechanism of water spray, high viscosity engine oil was used as the fuel in experiment.…”

Section: Introductionmentioning

confidence: 99%

Effect of the liquid temperature on the interaction behavior for single water droplet impacting on the immiscible liquid*

Wang¹,

Wang²,

Rui³

et al. 2021

Chinese Phys. B

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The interaction of single water droplet impacting on immiscible liquid surface was focused with the temperature varying from 50 °C to 210 °C. The impact behavior is recorded with a high-speed camera running at 2000 frames per second. It is found that droplet diameter, oil temperature, and Weber number have important influences on impact behaviors. Three typical phenomena, including penetration, crater-jet, and crater-jet–secondary jet, were observed. Penetration only occurs when the Weber number is below 105. With Weber number increasing to 302, the jet begins to appear. Moreover, to gain deeper physical insight into the crater formation and jet formation, the energy of droplet impingement onto the liquid pool surface was estimated. The oil temperature has a significant effect on the energy conversion efficiency. High temperature is beneficial to improve energy conversion efficiency.

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Comparison of single droplet impact behaviors on the burning shallow/deep pool

Fan

Wang

et al. 2019

European Journal of Mechanics - B/Fluids

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Dynamic behavior of single droplet impacting on heptane pool with different depths

Cited by 8 publications

References 41 publications

Inhibition of the Wall-attached Fuel Combustion and the Formation of Aerosol Particle

Inhibition of the Wall-attached Fuel Combustion and the Formation of Aerosol Particle

Effect of the liquid temperature on the interaction behavior for single water droplet impacting on the immiscible liquid*

Comparison of single droplet impact behaviors on the burning shallow/deep pool

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