A Note on the Forgotten Velocity Effect in Combustion Instability of Liquid Rockets

Abstract

The effects of the velocity vector upon the combustion processes in a liquid rocket are examined concerning their influence on linear stability. These effects, which have often been neglected in the past, are shown to potentially have extreme importance in stability criteria for both longitudinal and transverse modes. The magnitude of velocity effects is shown in some cases to require new analytical treatment of the system stability and to possibly require new interpretation of past experiments.