Dynamic interaction combustion with structural elements combustion chamber SPRE

E. N. Petrova, A. F. Salnikov

Perm National Research Polytechnic University, Perm, Russia

Abstract: In this article frequency interaction conditions, that affect on acoustic stability of solid-propellant rocket engine (SPRE) action, and its influence on level change of pressure fluctuations with longitudinal gas oscillations in the combustion chamber (CC) are considered. Studies of CC in the assessment of the operating rocket engine stability are reported. In most cases, stability analysis of operating SPRE is discussed in the context of certain processes, which are going in combustion chamber. For example, burning of solid propellant, forming of postcombustion flow and nozzle flow, etc. It dramatically reduces integral estimation of SPRE action, as a mechanic oscillation system in case of instability occurrence, associated with the pressure fluctuations in combustion chamber and engine thrust.

Keywords: combustion chamber, rocket engine, dynamics, structural elements.

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