Mechanism of Stabilization of the Combustion in the Duct of the Solid Fuel Grain of a Solid Fuel Ramjet

• Published in: Doklady. Physical chemistry (1991) Vol. 490; no. 2; pp. 9 - 13
• Main Authors: Rashkovskii, S. A., Milekhin, Yu. M., Fedorychev, A. V., Yakush, S. E.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-02-2020; Springer Nature B.V
• Subjects: Aerodynamics; Air flow; Chemistry; Chemistry and Materials Science; Combustion products; Computational fluid dynamics; Control stability; Flame holders; Flow stability; Flow velocity; Gas generators; Parameters; Physical Chemistry; Ramjet engines; Solid fuels; Stability analysis; Turbulent flow; combustion stability; solid fuel ramjet; critical conditions; solid fuel grain; flame holder; combustion stabilization mechanism
• ISSN: 0012-5016; 1608-3121
• DOI: 10.1134/S0012501620020013

The mechanism of stabilization of the combustion in the duct of the solid fuel grain of a solid fuel ramjet with a flame holder was analyzed for the first time. The flame holder can be either a shoulder in the inlet part of the duct, or an autonomous gas generator running on solid fuel capable of self-sustained combustion. A mathematical model for evaluating the stability of the combustion in the solid fuel ramjet grain duct was developed. It was shown that there are several parameters characterizing the solid fuel grain and the solid fuel ramjet as a whole that affect the stability of the operation of the solid fuel ramjet. The main control parameters are the temperature of the combustion products in the flame holder and the flow rate of the combustion products from the flame holder (which can be controlled by varying the sizes and shape of the flame holder), and also the degree of turbulence of the air flow in the solid fuel grain duct. The stability of the combustion in the duct of the solid fuel grain of the solid fuel ramjet was studied, and the possible modes of the operation of the solid fuel ramjet while varying the control parameters were determined.