A test device for ignition and combustion of micron-sized solid particles under high-speed airflow conditions

Abstract

The embodiment of the invention provides a micrometer order solid particle ignition burning test device under a jet stream condition. The device comprises four parts of a gas generator part, an afterburning chamber part, a sampling part and an observing part; the test device can change the ratio of fuel to an oxidant in the gas generator and realize stable controllable adjustment on mass and flow of solid particles, thus realizing the simulation of a working environment in the afterburning chamber of a ramjet of a solid rocket under different working conditions; a test process is monitored in real time by equipment such as a sensor and a high speed camera, a burnt product of the high energy solid particles is sampled in the test process, research on an ignition burning process of the micrometer order high energy solid in the afterburning chamber is realized, the test preparation time is shorter, the expense cost is lower, more observing methods can be used for a burning process in the afterburning chamber, more test data are obtained, the test system is good in reutilization, and engineering reference value of the obtained test data is high.

Description

Technical field [0001] The invention relates to a combustion test device, in particular to a micron solid particle ignition and combustion test device under high-speed airflow conditions. Background technique [0002] Solid rocket ramjet is abbreviated as solid rocket engine, such as figure 1 As shown, it is mainly composed of a gas generator 1, an intake duct 2, an afterburner 3, and a tail nozzle 4. The working principle is: After the missile is rapidly accelerated to the Mach number of the ramjet engine that can work normally by the booster, the engine intake is opened, the gas generator is ignited, and the fuel-rich solid propellant grain is burned in the gas generator to produce A large amount of rich fuel gas is blended with the incoming air in the afterburner and afterburning. The high-temperature gas is accelerated through the tail nozzle and ejected to provide continuous power for the engine. The afterburner is an important place for engine energy conversion, and its pe...

AI Technical Summary

Problems solved by technology

The experimental research is mainly based on the complete engine test and mechanism experiment. The preparation period of the complete test is long, the cost is high, the difficulty is high, the internal combustion process is difficult to observe, and the engine’s reusability is not good. However, the mechanism of solid particle combustion The experimental device is also difficult to simulate the actual working environment of the engine afterburning chamber, and the engineering reference value of the obtained experimental data is not high

Compared with experimental research, numerical simulation takes less time and costs less, but due to the corresponding simplification in the modeling process, the accuracy of the calculation results is difficult to guarantee

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