Apparatus and method for measuring aluminium combustion of solid propellant based on coaxial digital holographic method

Abstract

The invention discloses an apparatus and method for measuring aluminium combustion of a solid propellant based on a coaxial digital holographic method. The apparatus comprises a high-pressure sealed tester used for simulating combustion of a propellant in a combustion chamber of a solid rocket engine and a digital holographic system used for measuring aluminium particle combustion of a propellant,wherein the digital holographic system and the high-pressure sealed tester are vertically intersected, and the plane coherent light of the digital holographic system passes through the high-pressuresealed tester for measuring aluminium particle combustion of the propellant. The apparatus is used for dynamic measurement of aluminium particle combustion of a solid rocket engine propellant in a high-temperature high-pressure complex combustion flow field.

Description

technical field [0001] The invention belongs to the technical field of solid propellant aluminum combustion testing, and in particular relates to a solid propellant aluminum combustion measurement device and method based on a coaxial digital holography method. Background technique [0002] Understanding and mastering the combustion process and state characteristics of aluminum particles in the solid rocket motor combustion chamber is the premise of controlling and adjusting the engine performance and safety assessment, and it is also an important parameter for numerical simulation of the engine flow field. [0003] For the high-temperature, high-pressure, complex multi-phase combustion flow field in the engine, it is difficult to accurately capture the combustion process of aluminum particles. Currently, the dynamic measurement methods that can be used are mainly high-speed imaging technology. Design a high-pressure experimental sealed container to simulate the high-pressure...

AI Technical Summary

Problems solved by technology

For the tracking measurement of moving particles, it is difficult to ensure that the particles are always on the imaging plane, and the burning particles that deviate from the focal plane cannot be clearly captured

(2) The radioluminescence produced by the combustion flame has a great influence on the measurement, it is difficult to distinguish the combustion flame area and the condensed phase particle area, and it is difficult to accurately obtain the real particle size of the combustion particles

[0004] The laser particle size analyzer can obtain the particle size distribution spectrum of the particles, but the laser particle size analyzer can only obtain the change of the particle size distribution over time in the entire measurement space, and cannot obtain the particle size change of a single particle, nor can it obtain the particle shape and shape change

Insufficient for the measurement of burning particles

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