Generation of hydrodynamic instability in the gasification region of propellant

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• 作者：K. O. Sabdenov
• 关键词：the Vilyunov–Dvoryashin effect ; hydrodynamic instability ; propellant gasification region ; ¡natural¿ turbulence ; the Gusachenko–Zarko mechanism
• 刊名：Combustion, Explosion, and Shock Waves
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：52
• 期：6
• 页码：683-693
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Classical Mechanics; Classical and Continuum Physics; Physical Chemistry; Vibration, Dynamical Systems, Control; Engineering, general;
• 出版者：Pleiades Publishing
• ISSN：1573-8345
• 卷排序：52

文摘

This paper presents the new way of the occurrence of “natural” turbulence in the Gusachenko–Zarko mechanism of negative erosion effect during the propellant burning. It is shown that the propellant gasification region can generate hydrodynamic instability if its burning rate at a constant temperature depends on the pressure. The hydrodynamic instability of the propellant combustion that decompose according to the solid phase → liquid phase → gas and solid phase → gas scheme occurs under quite different conditions. The gasification region in propellants of the first type is more inclined to instability generation than that in propellants of the second type. The hydrodynamic instability occurs if the critical value of the Reynolds number, which depends on the properties of the propellant and environmental conditions, is exceeded.