S. Ma , D. Han , C. Zhang , J. Zhang , J.F. Huang , H.X. Li
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引用次数: 0
摘要
本文采用实验观察和数值分析相结合的方法研究了AZ80镁合金板的点火行为。实验结果表明，该合金的点火过程与A. L. Breiter提出的Ⅲ模型吻合较好。不同尺寸AZ80合金板的起燃时间存在明显差异。合金板尺寸越大，点火时间越长。仿真结果与实验测得的点火温升曲线吻合良好。在模拟结果的基础上，详细研究了合金板尺寸、熔化相变化、氧化层应变对系统内能、合金点火时间和点的影响。该研究为镁合金点火行为的启动过程提供了深入的认识。
Understanding the ignition behaviors of AZ80 magnesium alloy plates based on the experiments and numerical simulations
In this paper, the ignition behaviors of AZ80 magnesium alloy plates were studied by experimental observation and numerical analysis. From the experimental tests, it is shown that the ignition process of this alloy can fit very well with model Ⅲ proposed by A. L. Breiter. There exists the obvious difference in the starting ignition time for the AZ80 alloy plates with different size. The larger the size of the alloy plates, the longer the ignition time. Simulation results confirm an excellent agreement with the ignition temperature rise curve measured in this study. Based on the simulation results, the effects of the size of alloy plates, melting phase change, and the strain of oxidation layers on the internal energy of the system, the ignition time and ignition point of the alloys are also investigated in details. This study provides the deep understanding on the start-up process of ignition behaviors for the magnesium alloys.
期刊介绍：
The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on:
Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including:
Conventional, alternative and surrogate fuels;
Pollutants;
Particulate and aerosol formation and abatement;
Heterogeneous processes.
Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including:
Premixed and non-premixed flames;
Ignition and extinction phenomena;
Flame propagation;
Flame structure;
Instabilities and swirl;
Flame spread;
Multi-phase reactants.
Advances in diagnostic and computational methods in combustion, including:
Measurement and simulation of scalar and vector properties;
Novel techniques;
State-of-the art applications.
Fundamental investigations of combustion technologies and systems, including:
Internal combustion engines;
Gas turbines;
Small- and large-scale stationary combustion and power generation;
Catalytic combustion;
Combustion synthesis;
Combustion under extreme conditions;
New concepts.
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