高氯酸铵的多区数值燃烧模型

IF 6.7 1区 工程技术 Q2 ENERGY & FUELS
Fuel Pub Date : 2024-11-16 DOI:10.1016/j.fuel.2024.133742
Neeraj Kumar Pradhan , Jay Patel , Arindrajit Chowdhury , Debasis Chakraborty , Neeraj Kumbhakarna
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引用次数: 0

摘要

固体火箭发动机(SRM)是国防、卫星运载火箭用于通信、资源管理和太空探索的关键。复合固体推进剂的数值建模非常有助于优化性能、确保安全和补充实验测试。它提供了对燃烧动力学的深入了解,并允许精确定制以满足特定任务的需求,因此复合推进剂建模将继续发挥重要作用。AP(高氯酸铵)作为一种合成氧化剂,已广泛应用于现代复合固体推进剂中。因此,了解凝聚相加热和反应动力学、凝聚相和气相之间的相互作用以及气相燃烧等物理化学过程至关重要。本文提出了一个稳态数值模拟模型来研究 AP 的燃烧。在质量、能量和物种守恒的前提下,采用分区建模法分别处理固相、熔融层和气相,并将解与适当的边界条件耦合。针对凝聚相开发、验证和使用了一种简单的全局反应,其表面物种剖面优于现有文献。气相燃烧采用了详细的反应机制。该模型仅将液体视为凝聚相,并使用了新的凝聚相机理和预混合 AP/HTPB(羟基封端聚丁二烯)气相反应机理,而不是 AP 单推进剂气相机理。该模型是建立包含 AP 粒子和 AP/HTPB 粘合剂的更复杂的多模式复合推进剂模型的先决条件。不同发动机工作压力下的预测燃烧速率和初始温度敏感性与实验数据和其他理论数据十分吻合。此外,本模型模拟的熔层厚度也与实验观测结果十分吻合。对熔体温度和凝聚相反应活化能进行了敏感性分析。模拟还以合理的精度预测了表面温度和物种分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A multizonal numerical combustion model of ammonium perchlorate
Solid rocket motors (SRM) are essential for national defense, satellite launch vehicles for placing spacecraft for communications, resource management, and space exploration. Numerical modeling of composite solid propellants is very helpful for optimizing performance, ensuring safety, and complementing experimental testing. It provides insights into combustion dynamics and allows for precise customization to meet specific mission needs, so modeling composite propellants will stay important. AP (Ammonium Perchlorate), as a synthetic oxidizer, has been widely utilized in modern composite solid propellants. Therefore, it is crucial to understand the physicochemical processes such as condensed-phase heating and reaction kinetics, the interactions between the condensed and gas phases, and gas-phase combustion. A steady-state numerical simulation model is presented to study the combustion of AP. Zonal modeling is employed to treat the solid phase, melt layer, and gas phase separately with conservation of mass, energy, and species, and the solutions are coupled with appropriate boundary conditions. A simple global reaction is developed, validated, and used for the condensed phase with better surface species profiles than those available in the literature. A detailed reaction mechanism is used in the gas phase combustion. This model considers only liquid as a condensed phase and uses a newly condensed phase mechanism and a premixed AP/HTPB (hydroxyl-terminated polybutadiene) gas phase reaction mechanism instead of AP monopropellant gas phase mechanism. This modeling is a prerequisite for a more sophisticated multi-modal composite propellant model with AP grains and AP/HTPB binder. The predicted burn rate and initial temperature sensitivities for different motor operating pressures match well with experimental and other theoretical data. Also, the simulated melt layer thickness of the present model agrees well with experimental observations. Sensitivity analysis is performed for the melt temperature and activation energy for the condensed phase reaction. The simulation also predicts surface temperature and species profile with reasonable accuracy.
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来源期刊
Fuel
Fuel 工程技术-工程:化工
CiteScore
12.80
自引率
20.30%
发文量
3506
审稿时长
64 days
期刊介绍: The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.
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