Ethanol droplet evaporation: Effects of ambient temperature, pressure and fuel vapor concentration

被引:36
作者
Pinheiro, Abgail P. [1 ]
Vedovoto, Joao Marcelo [1 ]
Neto, Aristeu da Silveira [1 ]
van Wachem, Berend G. M. [2 ]
机构
[1] Univ Fed Uberlandia, Sch Mech Engn, Av Joao Naves Avila 2121,Bloco 5P, BR-38400902 Uberlandia, MG, Brazil
[2] Otto von Guericke Univ, Chair Mech Proc Engn, Univ Pl 2, D-39106 Magdeburg, Germany
关键词
Droplet evaporation; Ethanol; Ambient conditions; Numerical simulation; GAS TEMPERATURE; SINGLE DROPLET; COMBUSTION; DIESEL; BLENDS; BIOFUELS; SPRAY; MODEL; ALCOHOLS;
D O I
10.1016/j.ijheatmasstransfer.2019.118472
中图分类号
O414.1 [热力学];
学科分类号
摘要
Ethanol is considered a promising alternative fuel due to its advantages compared to conventional fossil fuels. Since fuel evaporation plays an important role in many applications, especially in energy systems involving spray combustion, this work aims to investigate the effects of ambient temperature, pressure and vapor concentration on the evaporation of a single ethanol droplet. In order to validate the theoretical model, numerical simulations of an ethanol droplet evaporation are performed and the results are validated with experimental data. The ambient temperature, pressure and vapor concentration were varied in the ranges of 400-1000 K, 0.1-2.0 MPa and 0.0-0.75, respectively. The results reveal that an increase in the ambient pressure causes an augmentation in the ratio of initial heat-up time to the whole evaporation lifetime, which enhances the unsteady effects of the droplet evaporation. This same ratio is almost independent of the gas temperature at low ambient pressure; however, as the ambient pressure is increased, the tendency of this ratio to increase with the gas temperature becomes significant. Additionally, the results show that there is a threshold ambient temperature, which determines whether the average area reduction rate will increase or decrease as the ambient pressure is increased. Finally, the results show that condensation effects are observed for non-zero ambient vapor concentration, and there is also a threshold ambient temperature which determines whether the average area reduction rate will increase or decrease as the ambient vapor concentration is increased. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页数:12
相关论文
共 50 条
  • [31] Evolution of a shock-impacted reactive liquid fuel droplet with evaporation effects: A numerical study
    Tarey, Prashant
    Ramaprabhu, Praveen
    McFarland, Jacob A.
    INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2024, 174
  • [32] A computational study of droplet evaporation with fuel vapor jet ejection induced by localized heat sources
    Sim, Jaeheon
    Im, Hong G.
    Chung, Suk Ho
    PHYSICS OF FLUIDS, 2015, 27 (05)
  • [33] Effects of turbulence intensity and n-pentanol concentration on droplet evaporation and auto-ignition
    Zhang, Yu
    Huang, Ronghua
    Zhou, Yang
    Zhou, Taotao
    Tao, Changfa
    Huang, Yuhan
    Qian, Yejian
    FUEL, 2022, 322
  • [34] DROPLET EVAPORATION CHARACTERISTICS ON HIGH-TEMPERATURE POROUS SURFACES FOR COOLING FUEL DEBRIS
    Yuki, Kohei
    Horiguchi, Naoki
    Yoshida, Hiroyuki
    Yuki, Kazuhisa
    PROCEEDINGS OF 2024 31ST INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING, VOL 6, ICONE31 2024, 2024,
  • [35] Source of Temperature and Pressure Pulsations during Sessile Droplet Evaporation into Multicomponent Atmospheres
    Persad, Aaron H.
    Sefiane, Khellil
    Ward, Charles A.
    LANGMUIR, 2013, 29 (43) : 13239 - 13250
  • [36] Evaporation characteristics of ethanol as alternative fuel in direct injection injector under high-temperature conditions
    Chang, Mengzhao
    Park, Suhan
    FUEL, 2019, 252 : 427 - 438
  • [37] Influences of Residence time of Fuel Vapor Transport on Sooting Behavior of Ethanol Droplet Flames in Microgravity
    Park, Seul-Hyun
    Choi, Mun Young
    MICROGRAVITY SCIENCE AND TECHNOLOGY, 2015, 27 (05) : 337 - 344
  • [38] Efficient electrochemical oxidation of ethanol to carbon dioxide in a fuel cell at ambient temperature
    Ghumman, Azra
    Pickup, Peter G.
    JOURNAL OF POWER SOURCES, 2008, 179 (01) : 280 - 285
  • [39] Measurement of interacting ethanol droplets evaporation at moderately elevated temperature and pressure using phase rainbow refractometry
    Lv, Qimeng
    Wu, Yingchun
    Wang, Xinhao
    Zeng, Lei
    Wu, Xuecheng
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2022, 196
  • [40] Spray dynamics and evaporation in a multihole GDI injector for pulsatile and split injection at elevated ambient pressure and temperature conditions
    Muddapur, Anandteerth
    Jose, Jubin V.
    Sahu, Srikrishna
    Sundararajan, T.
    FUEL, 2020, 279