数字全息在固体推进剂铝燃烧三维测量中的应用研究

推进技术 ›› 2018, Vol. 39 ›› Issue (9): 2102-2109.

数字全息在固体推进剂铝燃烧三维测量中的应用研究

金秉宁,刘佩进,王志新

西北工业大学燃烧、流动和热结构国家级重点实验室，陕西西安 710072,西北工业大学燃烧、流动和热结构国家级重点实验室，陕西西安 710072,西北工业大学燃烧、流动和热结构国家级重点实验室，陕西西安 710072

发布日期:2021-08-15
作者简介:金秉宁，男，博士，助理研究员，研究领域为固体火箭发动机燃烧不稳定及控制技术。 E-mail: jinbingning@nwpu.edu.cn 通讯作者:刘佩进，男，教授，博士生导师，研究领域为火箭发动机燃烧不稳定及激光燃烧诊断。
基金资助:
国家自然科学基金(51706186)。

Application of Digital Holography in 3D Measurement of Aluminum Combustion in Solid Propellant

National Key Laboratory of Combustion，Flow and Thermo–Structure，Northwestern Polytechnical University，Xi’an 710072，China,National Key Laboratory of Combustion，Flow and Thermo–Structure，Northwestern Polytechnical University，Xi’an 710072，China and National Key Laboratory of Combustion，Flow and Thermo–Structure，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

摘要/Abstract

摘要： 为获得固体推进剂铝颗粒动态燃烧的精细化过程，将数字全息技术用于固体推进剂铝燃烧三维动态过程测量中，成功地解决了传统光学显微成像法景深过小的问题。搭建了固体推进剂铝燃烧数字全息测量系统，分别在0.1MPa和1.0MPa压强条件下开展了推进剂中铝颗粒燃烧过程的三维测量工作，获得了铝颗粒动态燃烧过程的全息图像。研究结果表明:数字全息技术能够获得不同截面处的颗粒信息，并可跟踪颗粒的动态燃烧过程，准确地获得颗粒粒径信息，真正实现三维动态测量；全息法能够清晰地分辨出动态燃烧过程中十几微米至几百微米量级的铝颗粒，测量误差小于8%；跟踪单一铝颗粒的动态燃烧过程，可获得颗粒粒径、空间分布、粒径分布、燃烧火焰区域、运动速度以及氧化帽的动态生成过程等变化规律。

关键词: 固体推进剂；铝燃烧；三维测量；数字全息；图像重建

Abstract: In order to obtain the refined process of dynamic combustion of aluminum particles in the solid propellant， the digital holography technique is applied to the three-dimensional dynamic process measurement of aluminum combustion in solid propellant， which solves the problem of the small depth of the traditional optical direct imaging method. A digital holographic measurement system for aluminum combustion in solid propellant is developed， the experiments of the aluminum combustion are carried out under the pressure of 0.1MPa and 1.0MPa， and the holographic images of the 3D dynamic combustion process of aluminum particles in propellant combustion are obtained. The results show that the digital holography can obtain the particle information at different space planes， and track the dynamic combustion process of particles， obtain the particle size information accurately and realize the three-dimensional dynamic measurement. The holographic method can clearly distinguish more than ten micron to hundred micron scale aluminum particles in the dynamic combustion process， and the measurement error is less than 8%. After tracking the dynamic process of single aluminum particles， the variation laws of the particle size， space distribution， particle size distribution， combustion flame zone， particle velocity， and the dynamic formation process of the oxidation cap were clearly obtained. The establishment of this method can provide an effective three-dimensional experimental measurement method for studying the dynamic combustion mechanism of aluminum particles in solid propellant.

Key words: Solid propellant；Aluminum combustion；3D measurement；Digital holography；Image reconstruction

金秉宁,刘佩进,王志新. 数字全息在固体推进剂铝燃烧三维测量中的应用研究[J]. 推进技术, 2018, 39(9): 2102-2109.

JIN Bing-ning,LIU Pei-jin,WANG Zhi-xin. Application of Digital Holography in 3D Measurement of Aluminum Combustion in Solid Propellant[J]. Journal of Propulsion Technology, 2018, 39(9): 2102-2109.

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