Combustion Stability of Interior Ballistics of Liquid Propellant Mortar

被引：0
|
作者：
Sun M. [1 ]
Lu L. [2 ]
Liu N. [1 ]
Zhang X. [1 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing
[2] Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang
来源：
Binggong Xuebao/Acta Armamentarii | 2020年 / 41卷 / 11期
关键词：
Combustion; Liquid propellant mortar; Pressure oscillation; Reaction flow field; Regenerative liquid propellant gun;
D O I：
10.3969/j.issn.1000-1093.2020.11.001
中图分类号：
学科分类号：
摘要：
In order to explore the interior ballistic characteristics of liquid propellant mortar, a 60 mm liquid propellant mortar transient measurement system was developed to measure the pressure in combustion chamber and the muzzle velocity of mortar shell. Based on the experiment, a two-phase flow model with combustion reaction for liquid propellant mortar is established by using unsteady Eulerian-Lagrangian model and liquid propellant evaporation-combustion model. The coupling relationship between the complex gas phase flow field and the injection-combustion of liquid propellant as well as the formation mechanism of pressure oscillations are analyzed by simulating the reaction flow field during the interior ballistic process. The results show that the 60 mm liquid propellant mortar has excellent combustion stability. The numerically simulated results are in good agreement with the experimental results, where the experimental pressure oscillation is repeated, proving that the established model is reasonable and reliable. Both injection and combustion of liquid propellant are affected by gas vortex in combustion chamber. The concentrated combustion caused by the reflected waves makes the pressure appear as an oscillatory development. © 2020, Editorial Board of Acta Armamentarii. All right reserved.
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页码：2145 / 2154
页数：9
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