Method and device for diagnosing flow ignition combustion process and details of metal particles

Abstract

The invention discloses a method and a device for diagnosing the flow ignition combustion process and details of metal particles. The device comprises a solid fuel gas generator, a fuel gas channel and a windowing observation section which are sequentially communicated in the axial direction, the fuel gas channel is a cavity defined by a shell, a plurality of longitudinal powder catapults are arranged on the lower shell of the fuel gas channel, located outside the lower shell of the fuel gas channel and arranged at intervals in the length direction of the lower shell of the fuel gas channel, and the multiple powder catapults do not work at the same time and are all used for injecting metal powder into the fuel gas channel. By adopting the device, condensed phase deposition of the observation window can be effectively inhibited, and capture and diagnosis of a flame structure and combustion details in the whole process of ignition, combustion and flameout of metal particles along with flow are realized.

Description

【Technical field】 [0001] The invention belongs to the technical field of metal particle combustion, and in particular relates to a method and device for diagnosing the ignition combustion process and details of metal particles with flow. 【Background technique】 [0002] Metal particles have high volumetric energy density, excellent ignition and combustion properties, and are ideal energy additives. They are widely used in aerospace propulsion fields such as solid rocket motors and powder rocket motors[][]. In the rocket engine combustion chamber, the gas and particle flow velocity is often high (10-60m / s), and the particle size is small (1-200μm). The ignition and combustion process of metal particles is often coupled with flow, chemical reaction, heat and mass transfer process, and there are gas phase and surface reactions, which have great complexity. Compared with the static condition, there is an essential difference in the heat and mass transfer between particles and ga...

AI Technical Summary

Problems solved by technology

In the rocket engine combustion chamber, the gas and particle flow velocity is often high (10-60m / s), and the particle size is small (1-200μm). The ignition and combustion process of metal particles is often coupled with flow, chemical reaction, heat and mass transfer process, and there are gas phase and surface reactions, with greater complexity

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