Pressure intensity automatically balanced condensed-phase combustion product pollution-free collecting device

Abstract

The invention discloses a pressure intensity automatically balanced condensed-phase combustion product pollution-free collecting device.An engine combustion chamber of the device is of a cavity cylinder structure, two volume-adjustable cylinders are symmetrically fixed to the side wall face, a cylinder same as the combustion chamber is connected to the combustion chamber, and a vacuumizing hole, a vent hole and an argon inlet hole are formed in the combustion chamber.A propellant is put on the inner bottom face of the combustion chamber.Silicone rubber rings are compressed in the cylinders by utilizing pre-tightening bolts and pre-tightening nuts so that the silicone rubber rings can expand to produce a larger frictional force with the inner walls of the cylinders.Multiple safe vent holes are evenly distributed in the cylinders at intervals, and buffer gaskets and cylinder blocking plates are arranged at the tail ends of the cylinders.The collecting device adjusts the volume of the combustion chamber through a volume self-adjusting part, establishes a pressure-intensity negative feedback mechanism, maintains a stable pressure-intensity environment in the combustion chamber in the propellant combustion process and achieves pollution-free collection of all condensed-phase combustion products in the engine combustion chamber.

Description

technical field [0001] The invention relates to the technical field of solid rocket motors, in particular to a non-polluting collection device for pressure automatic equilibrium condensed phase combustion products. Background technique [0002] In solid propellants, metal fuels with higher combustion calorific value, such as aluminum powder, are usually added to increase the specific impulse of the solid propellant. For high aluminum-containing composite propellants, due to the high temperature in the combustion chamber, the metal combustion product Al 2 o 3 It is in a molten state in the gas, that is, condensed phase particles. The particle size and distribution of condensed phase combustion products are important parameters for engine performance analysis and work process simulation, such as the analysis of the law of two-phase flow of solid rocket motors, the mechanical erosion of condensed phase products on the engine insulation layer and nozzle, and the mechanical ero...

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that the combustion products at the plume are collected and the samples collected are too small and unrepresentative

The collection device can realize the collection of condensed-phase combustion products; the disadvantage is that the condensed-phase particles are frozen with water, and there is a phenomenon of chemical reaction between water and condensed-phase particles, which affects the accuracy of the experimental results

The collection device can realize the pollution-free collection of all condensed phase combustion products at the outlet of the nozzle, but the limitation is that it cannot collect the condensed phase combustion products in the combustion chamber of the engine

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