Thrust augmentation through after-burning in scramjet nozzles

Michael J. Candon, Hideaki Ogawa, Graham E. Dorrington

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Scramjets are a class of hypersonic airbreathing engine that are associated with realizing the technology required for economical, reliable access-to-space and high-speed atmospheric transport. Afterburning augments the thrust produced by the scramjet nozzle and creates a more robust nozzle design. This paper presents a numerical study of three parameters and the effect that they have on thrust augmentation. These parameters include the injection pressure, injection angle and streamwise injection position. It is shown that significant levels of thrust augmentation are produced based upon contributions from increased pressure, mass flow and energy in the nozzle. Further understanding of the phenomenon by which thrust augmentation is being produced is provided in the form of a force contribution breakdown, analysis of the nozzle flowfields and finally the analysis of the surface pressure and shear stress distributions acting upon the nozzle wall.

Original languageEnglish
Pages (from-to)183-198
Number of pages16
JournalAdvances in Aircraft and Spacecraft Science
Issue number2
Publication statusPublished - Apr 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fluid Flow and Transfer Processes


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