Experimental device for particle combustion under high speed air flow

Abstract

The embodiment of the invention provides an experimental device for particle combustion under high speed air flow. The experimental device comprises a windowing test system, a pipeline supply system and a measuring-controlling system. Solid particles are fixed in high-temperature and high-speed combustion air; a current stabilizing segment and an experimental time sequence are designed, so that the particles fully burn in approximately-one-dimensional uniform high temperature airflow; quartz glass which is resistant to a high temperature of over 1,000 DEG C and is transparent and through which a particle combustion characteristic spectrum can penetrate through is taken as a material of a viewing window at a windowing test stage, and the ignition-combustion process of the particles is observed through the window, so that the ignition and combustion mechanisms of the particles in the high speed airflow are researched, and knowledge about the internal combustion process of a solid rocket ramjet containing the particles and a fuel-rich propellant is improved.

Description

technical field [0001] The invention relates to the field of combustion experiment devices, in particular to a particle ignition and combustion experiment device under the condition of high-speed air flow. Background technique [0002] Due to the lack of oxygen and low temperature in the gas generator of the fuel-rich propellant solid impulse engine containing metal particles, the particles cannot be fully ignited and burned. Blending completes secondary combustion. Affected by the primary gas injection method and the ram air intake method, the particles are often under the action of forced convection. Under the action of forced convection, a boundary layer with a large velocity gradient is formed around the particles, and the combustion flow field around the particles also deviates from the spherical symmetry structure in a relatively static atmosphere. These are very different from the ignition and combustion process of particles in a static atmosphere. Studying the igni...

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Problems solved by technology

Studying the ignition and combustion process of particles under the condition of high-speed airflow, revealing its internal mechanism and control mode, will lay the foundation for further research on the high-efficiency energy conversion of solid-impulse engines containing fuel-rich propellants with particles, and has important academic significance and engineering application value. However, no domestic and foreign experimental research on this process has been published.

The reason is that there are several difficulties in this experimental research. First, there are certain technical difficulties in the production of stable high-temperature gas with controllable and adjustable high-temperature and high-speed component concentration, velocity, and temperature. Second, there are certain technical difficulties in fixing solid particles in high-temperature and high-speed gas. Certain technical difficulties, and finally, it is difficult to observe the combustion process of particles under high-temperature and high-speed airflow

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