| 引用本文: | 赵银,田德余,江瑜.过氯酸铵 (AP) 爆燃的模拟.[J].国防科技大学学报,1988,10(3):39-47, 110.[点击复制] |
| Zhao Yin,Tian Deyu,Jiang Yu.Modeling Investigation of Self Deflagration of Ammonium Perchrolate[J].Journal of National University of Defense Technology,1988,10(3):39-47, 110[点击复制] |
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| 过氯酸铵 (AP) 爆燃的模拟 |
| 赵银, 田德余, 江瑜 |
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(材料科学与应用化学系)
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| 摘要: |
| 本文提出一个描述AP爆燃的物理化学模型，并计算了AP 晶粒在10～800大气压下的爆燃速度、压力指数、燃面温度等参数值，计算结果和T.L.Boggs等人的实验结果相符。文中提出AP爆燃过程中，在低压和高压下，可能存在着两种不同的凝聚相反应机理，并用以解释 Boggs 的实验现象。此外，本文还提出了一种描述绝热体系中，预混火焰燃烧时的化学反应速度表示式和计算方法，使气相温度梯度及热传导的计算简单合理，这也是本模拟研究取得成功的因素之一。 |
| 关键词: 固体推进剂，燃烧 |
| DOI： |
| 投稿日期：1987-07-27 |
| 基金项目: |
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| Modeling Investigation of Self Deflagration of Ammonium Perchrolate |
| Zhao Yin, Tian Deyu, Jiang Yu |
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(Department of Materials Science and Applied Chemistry)
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| Abstract: |
| A physiochemical model of the self-deflagration of pure single crystal of ammonium perchlorate (AP) has been developed in this paper. The values of the self-deflagrating rate. pressure exponent and burning surface temperature at the pressures between 10 and 800 atm are calculated. The resucts are in good agreement with the experimental data made by Boggs.[2]
The calculations are based apon the assumptions that the decomposition of crgstal AP follows two competitive process. At low pressures，AP melts at first，decomposes and then the products react each other in the condensed phase accompanying with the generation of heat. The exothermic reaction in the condensed phase is the main heat source of Ap def1agration at low pressuress. And at the high pressares，the beat transferred from the gas phase to the burning surface increases rapidly，forming the direct decomposition and vaporization of crystal Ap. The regularity of burning rate changing with the pressure obtaind by Boggs' experiments can be clearly illustrated from these assumptions and calculations. This paper also uses a kind of new chemical reaction rate expression dT/dt (T is "temperature") to describe the Ap deflagration and presents the calculation method. This new expression facilitates the calculation of gas phase temperature gradient and makes the theoretical modeling succeed. |
| Keywords: Solid propellants,Combustion |
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