International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

A Widely Indexed Open Access Peer Reviewed Multidisciplinary Bi-monthly Scholarly International Journal

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Literature Review of Combustion Instability in Solid Rocket Motors

Author(s) Ms. Akanksha Chaudhry, Prof. Dr. Nagendra Kumar, Prof. Dr. Sudarshan Kumar, Mr. Rohit Sehrawat, Mr. Arvind Kumar
Country India
Abstract Solid rocket motors (SRMs) are fundamental components of space and defense propulsion systems, valued for their reliability, simplicity, and high thrust-to-weight ratios. However, a critical challenge in SRM operation is combustion instability (CI), characterized by self-sustaining pressure oscillations that can severely impact motor performance and structural integrity, occasionally resulting in catastrophic failure. This paper presents a comprehensive review of combustion instability in SRMs, tracing its historical context, underlying physical mechanisms, and classification across frequency ranges. Emphasis is placed on acoustic modes, Rayleigh’s criterion, and the nonlinear phenomena governing CI dynamics. The paper synthesizes knowledge on key driving mechanisms, including pressure-coupled and velocity-coupled responses, vortex shedding, and distributed combustion, alongside damping effects such as nozzle, particle, flow turning, boundary layer, and structural damping. Through examination of linear and nonlinear stability analyses, mode coupling, limit cycles, DC shifts, and waveform distortions, the complex interplay of combustion, acoustics, and fluid dynamics in SRMs is elucidated. This integrated perspective highlights advances in experimental diagnostics and modeling techniques that continue to enhance prediction and mitigation strategies, ultimately guiding improved SRM design for operational reliability.
Field Engineering
Published In Volume 7, Issue 5, September-October 2025
Published On 2025-09-05
DOI https://doi.org/10.36948/ijfmr.2025.v07i05.55094
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E-ISSN 2582-2160
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