Combustion Stability Of Gaseous CH4/O2 And H2/O2 Coaxial Jet ...

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IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v132y2017icp57-64.html My bibliography Save this article Combustion stability of gaseous CH4/O2 and H2/O2 coaxial jet flames in a single-element combustor
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Author

Listed:
  • Choi, Sun
  • Kim, Tae Young
  • Kim, Hee Kyung
  • Jeung, In-Seuck
  • Koo, Jaye
  • Kwon, Oh Chae
Registered:

Abstract

In order to understand the combustion stability of a methane (CH4)/oxygen (O2) bipropellant as a next-generation rocket liquid propellant, the combustion stability limits and morphology of gaseous CH4/O2 (GCH4/GO2) coaxial jet flames, among various phases, in a single-element combustor are experimentally studied compared with the gaseous hydrogen/O2 (GH2/GO2) coaxial jet flames. Only the stably attached flame and blowoff regimes are observed for both the GCH4/GO2 and GH2/GO2 flames, showing the flame thickness smaller than the injector lip thickness. Although the combustion stability limits of the GCH4/GO2 flames are narrower than the GH2/GO2 flames, practical use of CH4 in rocket engine applications seems to be acceptable since the fuel-rich CH4/O2 flames show very stabilized and intensified burning. For the GCH4/GO2 flames, the outer flame generated by the recirculating O2 is relatively weak and OH∗ is distributed up to the downstream. With increasing O2 injection velocity the length of the GCH4/GO2 flames and the location at the maximum OH∗ intensity increase even under turbulent combustion condition, due to the saturated enhancement of CH4-O2 diffusivity and the strong burning of pure O2 near the injector lip. The present results provide a useful database to model combustion of CH4/O2 bipropellants under various phases.

Suggested Citation

  • Choi, Sun & Kim, Tae Young & Kim, Hee Kyung & Jeung, In-Seuck & Koo, Jaye & Kwon, Oh Chae, 2017. "Combustion stability of gaseous CH4/O2 and H2/O2 coaxial jet flames in a single-element combustor," Energy, Elsevier, vol. 132(C), pages 57-64.
    • Handle: RePEc:eee:energy:v:132:y:2017:i:c:p:57-64 DOI: 10.1016/j.energy.2017.05.057 as HTML HTML with abstract plain text plain text with abstract BibTeX RIS (EndNote, RefMan, ProCite) ReDIF JSON

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    File URL: http://www.sciencedirect.com/science/article/pii/S0360544217308137Download Restriction: Full text for ScienceDirect subscribers only File URL: https://libkey.io/10.1016/j.energy.2017.05.057?utm_source=ideas LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item --->

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