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Investigation of the Effects of Ambient Conditions and Injection Strategies on Methanol Spray Characteristics.

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Title: Investigation of the Effects of Ambient Conditions and Injection Strategies on Methanol Spray Characteristics.
Authors: Wang, Decheng1,2 (AUTHOR), Zhu, Wuzhe2,3 (AUTHOR), Li, Zhijie1,2,3 (AUTHOR), Zhai, Changhui1,2 (AUTHOR), Zeng, Xiaoxiao1,2 (AUTHOR), Shi, Kui1,2,3 (AUTHOR), Qi, Yunliang3 (AUTHOR), Wang, Zhi3 (AUTHOR) wangzhi@tsinghua.edu.cn
Source: Energies (19961073). Jan2026, Vol. 19 Issue 2, p416. 24p.
Subjects: Atomization, Temperature effect, Weather, Computational fluid dynamics, Injections, Evaporation (Chemistry), Methanol, Dynamic pressure
Abstract: To reveal the physical evolution of methanol spray under different environmental conditions and injection strategies, this study focuses on the atomization and evaporation behavior of low-pressure methanol spray. The coupled effects of temperature, pressure, and injection parameters are systematically investigated based on constant-volume combustion chamber experiments and three-dimensional CFD simulations. The formation, evolution, and interaction mechanisms of the liquid column core and cooling core are revealed. The results indicate that temperature is the dominant factor influencing methanol spray atomization. When the temperature increases from 255 K to 333 K, the spray penetration distance increases by approximately 70%, accompanied by a pronounced shortening of the liquid-core length and enhanced evaporation and air entrainment. Under low-temperature conditions, a stable liquid-core structure and a strong cooling core are formed, characterized by a high-density, long-axis morphology and an extensive low-temperature region, which suppress fuel–air mixing and ignition. Increasing the ambient pressure improves spray–air mixing but reduces penetration; at 255 K, increasing the ambient pressure from 0.05 MPa to 0.2 MPa increases the spray cone angle by approximately 10% while reducing the penetration distance by about 50%. Furthermore, optimizing the injection pressure or shortening the injection pulse width effectively enhances atomization performance: increasing the injection pressure from 0.4 MPa to 0.6 MPa and reducing the pulse width from 5 ms to 2 ms increases the penetration distance by approximately 30% and reduces the mean droplet diameter by about 20%. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 191171857
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Investigation of the Effects of Ambient Conditions and Injection Strategies on Methanol Spray Characteristics.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Decheng%22">Wang, Decheng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Wuzhe%22">Zhu, Wuzhe</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Zhijie%22">Li, Zhijie</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhai%2C+Changhui%22">Zhai, Changhui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zeng%2C+Xiaoxiao%22">Zeng, Xiaoxiao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Kui%22">Shi, Kui</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qi%2C+Yunliang%22">Qi, Yunliang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhi%22">Wang, Zhi</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> wangzhi@tsinghua.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2026, Vol. 19 Issue 2, p416. 24p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Atomization%22">Atomization</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Weather%22">Weather</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Injections%22">Injections</searchLink><br /><searchLink fieldCode="DE" term="%22Evaporation+%28Chemistry%29%22">Evaporation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Methanol%22">Methanol</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+pressure%22">Dynamic pressure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To reveal the physical evolution of methanol spray under different environmental conditions and injection strategies, this study focuses on the atomization and evaporation behavior of low-pressure methanol spray. The coupled effects of temperature, pressure, and injection parameters are systematically investigated based on constant-volume combustion chamber experiments and three-dimensional CFD simulations. The formation, evolution, and interaction mechanisms of the liquid column core and cooling core are revealed. The results indicate that temperature is the dominant factor influencing methanol spray atomization. When the temperature increases from 255 K to 333 K, the spray penetration distance increases by approximately 70%, accompanied by a pronounced shortening of the liquid-core length and enhanced evaporation and air entrainment. Under low-temperature conditions, a stable liquid-core structure and a strong cooling core are formed, characterized by a high-density, long-axis morphology and an extensive low-temperature region, which suppress fuel–air mixing and ignition. Increasing the ambient pressure improves spray–air mixing but reduces penetration; at 255 K, increasing the ambient pressure from 0.05 MPa to 0.2 MPa increases the spray cone angle by approximately 10% while reducing the penetration distance by about 50%. Furthermore, optimizing the injection pressure or shortening the injection pulse width effectively enhances atomization performance: increasing the injection pressure from 0.4 MPa to 0.6 MPa and reducing the pulse width from 5 ms to 2 ms increases the penetration distance by approximately 30% and reduces the mean droplet diameter by about 20%. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/en19020416
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 24
        StartPage: 416
    Subjects:
      – SubjectFull: Atomization
        Type: general
      – SubjectFull: Temperature effect
        Type: general
      – SubjectFull: Weather
        Type: general
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: Injections
        Type: general
      – SubjectFull: Evaporation (Chemistry)
        Type: general
      – SubjectFull: Methanol
        Type: general
      – SubjectFull: Dynamic pressure
        Type: general
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      – TitleFull: Investigation of the Effects of Ambient Conditions and Injection Strategies on Methanol Spray Characteristics.
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            NameFull: Wang, Decheng
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              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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