Liquid-propellant rocket engine injector dynamics

Vladimir G. Bazarov, Vigor Yang

Research output: Contribution to journalArticlepeer-review

149 Citations (Scopus)


The dynamic characteristics of liquid-rocket injectors in the presence of intense combustion-chamber and propellant feed-line oscillations are discussed. Liquid-propellant injectors always function in non-steady flow environments and are therefore considered as a dynamic component of an engine. In addition to its main function of injecting propellant and preparing a combustible mixture, an injector simultaneously acts as a sensitive element that may generate and modify flow oscillations because of its intrinsic unsteadiness and interactions with the combustion-chamber and feed-system dynamics. This paper also addresses nonlinear effects of nonstationary processes occurring in injectors. Various mechanisms for driving self-pulsations in both liquid and gas-liquid injectors are summarized systematically. A vital problem of bifurcational unsteadiness of injector operation is considered.

Original languageEnglish
Pages (from-to)797-806
Number of pages10
JournalJournal of Propulsion and Power
Issue number5
Publication statusPublished - 1998

All Science Journal Classification (ASJC) codes

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


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