固体火箭发动机燃烧不稳定研究进展与展望

Advances and Prospects of Combustion Instability in Solid Rocket Motors

关键词:  固体火箭发动机  燃烧不稳定  非线性动力学  热-声耦合  极限环

Key words:  Solid rocket motor  Combustion instability  Nonlinear dynamics  Thermoacoustic coupling  Limit cycle

摘要:

围绕固体火箭发动机燃烧不稳定的研究现状及未来发展趋势进行了探讨。为了深入认识固体火箭发动机中的燃烧不稳定现象，并形成对其进行准确预示和有效抑制的方法，需要解决理论、计算及实验多方面的基础问题：燃烧不稳定的物理机制，不稳定的预示方法，发动机中各种增益和阻尼因素的特征，振荡增长过程中触发和极限环形成的机理，不稳定抑制技术及地面实验的等效分析方法。最后给出了总结与建议，明确了固体火箭发动机燃烧不稳定研究的目标和方向。

Abstract:

The state of art and possible future development of the combustion instability in the solid rocket motor are discussed. Several fundamental problems in theoretical， numerical and experimental studies should be taken care of for a deep insight of the combustion instability phenomenon in solid rocket motors， a reliable prediction method and an effective controlling technique， including the physical mechanism of the combustion instability， the instability evaluation method， the characteristics of the excitation and damping factors in the motors， the mechanisms of the triggering and the birth of limit cycle in the growing oscillation， and the controlling technique of the instability， as well as its ground test with the equivalency relation between the ground and flight tests. At last， the conclusions and suggestions are given， emphasising the directions and objectives for the study of the combustion instability in solid rocket motors.