COMBUSTION INSTABILITY. ANALYTICAL SURVEY

Abstract

Liquid rocket engines are subject to a wide variety of types of combustion instability. The two basic instability modes are 'chugging,' a low- frequency instability mode which is caused by interaction between the chamber pressure and the injection flow rate fluctuations, and 'screaming,' a more harmful high-frequency, acoustic instability mode which may lead to burnout of the motor due to increased heat flux. Only two articles on low-frequency instability were found in Soviet open literature. Experimental studies or analyses of high-frequency instability which take into account actual engine operation, i.e., mixing, evaporation, dissociation fuel atomization, etc., were not found in the literature surveyed. However, several theoretical studies were found which deal with highfrequency instability under idealized conditions. The majority of the Soviet studies included in this report deal with the interaction of shock and pressure waves with the flame front. These studies are of high phenomenological interest and are indirectly applicable to combustion stability analysis.

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Document Details

Document Type
Technical Report
Publication Date
Mar 10, 1965
Accession Number
AD0459097

Entities

Organizations

  • Library of Congress

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Velocity
  • Burning Rate
  • Chemical Reactions
  • Combustion
  • Combustion Chambers
  • Combustion Products
  • Combustors
  • Heat Of Combustion
  • Heat Transfer
  • Ignition
  • Ignition Lag
  • Liquid Propellants
  • Mach Number
  • Photographs
  • Ramjet Engines
  • Rocket Engines
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Control Systems Engineering.