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Lip Thickness Effect on Coaxial Subsonic and Correctly Expanded Sonic Jet Mixing.

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Title: Lip Thickness Effect on Coaxial Subsonic and Correctly Expanded Sonic Jet Mixing.
Authors: Angelin, Irish1, Narenshankar, R.2, Sathishkumar, K.3 satz_aero@yahoo.com, Lokesh, K.3, Joel, E. Jeswanth3, Oneashi, R.3, Gowtham, A. Saravana3
Source: International Journal of Vehicle Structures & Systems (IJVSS). 2025, Vol. 17 Issue 5, p766-771. 6p.
Subjects: Mach number, Subsonic flow, Jet engines, Pressure drop (Fluid dynamics), Flow velocity
Abstract: The effects of lip thickness on coaxial subsonic and correctly expanded sonic jet at low-velocity ratio and high-velocity ratio have been studied numerically. Subsonic and correctly expanded sonic jets from coaxial jets of the same main nozzle exit diameter with velocity ratios of 20% and 100% at Mach numbers of 0.6 have been studied. A single jet having the same primary nozzle exit diameter as a coaxial main nozzle exit diameter was also analysed for correlation. Centerline total pressure and static pressure decay in the jet core. The findings indicate that the mixing of the highvelocity ratio jet is superior to the low-velocity ratio jet at all Mach numbers considered in this research. Also, the rim thickness of a coaxial nozzle strongly influences the jet flow mixing. Coaxial stream of lip thicknesses 10.7mm experience significantly higher mixing than the other lip thicknesses at both low and high-velocity ratios. For low lip thickness, the mixing of VR 20 becomes inferior to that of VR 100 coaxial jets. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Vehicle Structures & Systems (IJVSS) is the property of Carbon Magics Ltd 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 190684243
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PubType: Academic Journal
PubTypeId: academicJournal
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  Group: Ti
  Data: Lip Thickness Effect on Coaxial Subsonic and Correctly Expanded Sonic Jet Mixing.
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  Data: <searchLink fieldCode="AR" term="%22Angelin%2C+Irish%22">Angelin, Irish</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Narenshankar%2C+R%2E%22">Narenshankar, R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sathishkumar%2C+K%2E%22">Sathishkumar, K.</searchLink><relatesTo>3</relatesTo><i> satz_aero@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Lokesh%2C+K%2E%22">Lokesh, K.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Joel%2C+E%2E+Jeswanth%22">Joel, E. Jeswanth</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Oneashi%2C+R%2E%22">Oneashi, R.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Gowtham%2C+A%2E+Saravana%22">Gowtham, A. Saravana</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Vehicle+Structures+%26+Systems+%28IJVSS%29%22">International Journal of Vehicle Structures & Systems (IJVSS)</searchLink>. 2025, Vol. 17 Issue 5, p766-771. 6p.
– Name: Subject
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  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Mach+number%22">Mach number</searchLink><br /><searchLink fieldCode="DE" term="%22Subsonic+flow%22">Subsonic flow</searchLink><br /><searchLink fieldCode="DE" term="%22Jet+engines%22">Jet engines</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure+drop+%28Fluid+dynamics%29%22">Pressure drop (Fluid dynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+velocity%22">Flow velocity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The effects of lip thickness on coaxial subsonic and correctly expanded sonic jet at low-velocity ratio and high-velocity ratio have been studied numerically. Subsonic and correctly expanded sonic jets from coaxial jets of the same main nozzle exit diameter with velocity ratios of 20% and 100% at Mach numbers of 0.6 have been studied. A single jet having the same primary nozzle exit diameter as a coaxial main nozzle exit diameter was also analysed for correlation. Centerline total pressure and static pressure decay in the jet core. The findings indicate that the mixing of the highvelocity ratio jet is superior to the low-velocity ratio jet at all Mach numbers considered in this research. Also, the rim thickness of a coaxial nozzle strongly influences the jet flow mixing. Coaxial stream of lip thicknesses 10.7mm experience significantly higher mixing than the other lip thicknesses at both low and high-velocity ratios. For low lip thickness, the mixing of VR 20 becomes inferior to that of VR 100 coaxial jets. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Vehicle Structures & Systems (IJVSS) is the property of Carbon Magics Ltd 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: 10.4273/ijvss.17.5.04
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 766
    Subjects:
      – SubjectFull: Mach number
        Type: general
      – SubjectFull: Subsonic flow
        Type: general
      – SubjectFull: Jet engines
        Type: general
      – SubjectFull: Pressure drop (Fluid dynamics)
        Type: general
      – SubjectFull: Flow velocity
        Type: general
    Titles:
      – TitleFull: Lip Thickness Effect on Coaxial Subsonic and Correctly Expanded Sonic Jet Mixing.
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            NameFull: Angelin, Irish
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            NameFull: Narenshankar, R.
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            NameFull: Sathishkumar, K.
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            NameFull: Joel, E. Jeswanth
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            NameFull: Oneashi, R.
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            NameFull: Gowtham, A. Saravana
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            – D: 01
              M: 08
              Text: 2025
              Type: published
              Y: 2025
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