Particle airflow suspension laser ignition experiment device

Abstract

The invention discloses a particle airflow suspension laser ignition experiment device belonging to the technical field of solid rocket engines. The particle airflow suspension laser ignition experiment device enables particles to suspend in space in a combustor by means of tiny airflow, and the particles are not in contact with a metal wall plate, and are continuously heated and ignited by using a high-energy laser igniter. A gas environment is adjustable, single gas can be fed or different kinds of gases are simultaneously fed so that the purpose of testing particle ignition processes under different gas environments is achieved. Four transparent windows are arranged on the combustor, wherein two windows are observation windows and two windows are germanium glass windows; a working process is observed and tested by means of the two observation windows, laser generated by the laser igniter shoots into the combustor by means of the two germanium glass windows, the power of the laser igniter is regulated, and the particles suspending in the combustor are heated and ignited; a detailed process of particle ignition combustion are shot by means of the observation windows by using a high-speed photography system. The experiment device can be used for researching ignition and combustion characteristics of metal particles and nonmetal particles.

Description

technical field [0001] The invention belongs to the technical field of solid rocket motors, and in particular relates to a particle airflow suspension laser ignition experimental device. Background technique [0002] In order to increase the energy of solid propellants, boron and aluminum particles with high heat of combustion are usually added to the solid propellant. These particles not only increase the density and specific impulse of the propellant, but also significantly affect the ignition and combustion performance of the solid propellant. At present, the research on particle ignition characteristics mainly adopts arc ignition method, shock tube method, thermal analyzer method and laser ignition method. [0003] The arc ignition method uses an electromagnetic field to suspend metal particles, and then applies a high-voltage arc to ignite the metal particles. In the patent CN86105020, an ignition device for a vacuum arc plasma generation system is disclosed, which inc...

AI Technical Summary

Problems solved by technology

However, this laser ignition device cannot obtain the ignition conditions of the particles in different gas environments, and is the same as the current common laser ignition device. The particles are placed in the combustion chamber and ignited when they contact the combustion chamber. Most of the particles in the device are in a suspended state, and the device cannot be used for suspended particle ignition experiments

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