Catalytic combustion engine and combustion method for high viscosity ionic liquid propellant

Abstract

The invention discloses a catalytic combustion engine for a high-viscosity ionic liquid propellant and a combustion method. The engine comprises a foam metal preheater, a control valve, a vortex injector, a catalytic bed, a catalytic bed preheater and an injection pipe; a porous-medium fluid channel is arranged in the foam metal preheater, the foam metal preheater is connected with one end of an inlet of the control valve, a propellant flow channel is arranged in the control valve and communicates with the porous-medium fluid channel, the other end of the control valve is connected with one end of the catalytic bed through the vortex injector, and a vortex groove is formed in the vortex injector; and the other end of the catalytic bed is connected with the injection pipe, and the catalyticbed preheater used for heating the catalytic bed is installed on the outer wall face of the catalytic bed.

Description

technical field [0001] The invention relates to a catalytic combustion engine and a combustion method for a high-viscosity ionic liquid propellant, which can realize stable operation of the engine under steady state and pulse working conditions, and belongs to the field of liquid space engines Background technique [0002] Ionic liquid propellants have the characteristics of high energy content, low toxicity, extremely low saturated vapor pressure, easy storage, and easy interaction with electric fields, and can be used as propellants for electric propulsion / chemical propulsion dual-mode space propulsion systems. The energetic ionic liquid propellant is composed of oxidant (ammonium dinitramide ADN, or hydroxylammonium nitrate HAN, etc.), ionic liquid (1-ethyl-3-methylimidazolium ethyl sulfate ionic liquid, etc.) and a small amount of solvent. The component-mixed liquid propellant can not only release chemical energy through combustion under certain conditions, so as to real...

AI Technical Summary

Problems solved by technology

[0006] 1) Before the propellant enters the control valve, there is no heating function of the metal foam preheater, and the viscosity of the ionic liquid propellant cannot be reduced by preheating, resulting in a high viscosity of the propellant and poor fluidity, which seriously affects the flow of the propellant and atomization process, affecting catalytic combustion efficiency and engine performance

[0007] 2) The atomization performance of the capillary injector is poor, and this defect is more obvious for high-viscosity fluids. After the propellant that is not fully atomized enters the catalytic bed, it affects the catalytic combustion efficiency and engine performance

[0008] 3) The atomization chamber is not included in the engine structure, so that the propellant directly contacts the catalytic bed from the outlet of the injector, and the propellant cannot be fully atomized, which affects the catalytic combustion efficiency and engine performance

Images