Performance analysis of secondary gas injection into a conical rocket nozzle

Hyun Ko, Woong Sup Yoon

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


The effects of injection location of secondary jet and nozzle divergent cone angle on the performance of secondary gas injection for thrust vector control (SITVC) were numerically investigated. Three-dimensional Reynolds-averaged Navier-Stokes equations with an algebraic turbulence model solved the complex three-dimensional nozzle flows perturbed by the secondary gas jet. The numerical code was properly validated by experiment. The results showed that downstream secondary jet injection and smaller nozzle divergent cone angles lead to higher efficiencies over a wide range of pressure ratios. The occurrence of reflected shock waves severely lowers SITVC propulsion performance. Upstream jet injection is more effective in a narrow range of deflection.

Original languageEnglish
Pages (from-to)585-591
Number of pages7
JournalJournal of Propulsion and Power
Issue number3
Publication statusPublished - 2002

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science


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