Combustion of ammonium dinitramide, Part 2 Combustion mechanism
Combustion of ammonium dinitramide, Part 2 Combustion mechanism
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DOI：
10.2514/1.17955
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发表时间：
2006-07
影响因子：
1.9
通讯作者：
V. P. Sinditskii;V. Y. Egorshev;A. I. Levshenkov;V. V. Serushkin-V.
中科院分区：
文献类型：
--
作者：
V. P. Sinditskii;V. Y. Egorshev;A. I. Levshenkov;V. V. Serushkin-V.
在0.04~10 Mpa的压力范围内，用薄钨铼热电偶测量了二硝酰胺铵(ADN)燃烧波的温度分布。这些数据表明，ADN在凝固区的分解反应在低压燃烧中起主导作用。从气体到表面的热反馈似乎可以忽略不计。结果表明，解离生成NH3和HNO3的反应控制着ADN的燃烧表面温度。发现了ADN燃烧波的三区火焰结构，并提出了这些区域发生的主要化学反应。在低压下(<1 Mpa)，ADN的燃烧过程可用凝聚相燃烧模型较好地描述，其速率控制反应为ADN在熔体中的分解。一次火焰中HNO3分解为控制反应的气相模型可用于高压下(10 Mpa以上)。在中压段，ADN表现为凝聚物产热不足引起的燃烧不稳定。在这一领域，凝聚相中快速但能量有限的放热过程必须适应气相中缓慢但能量丰富的放热过程。
Temperature profiles in the ammonium dinitramide (ADN) combustion wave were measured in the 0.04-10 MPa pressure interval using thin tungsten-rhenium thermocouples. The data obtained suggest that the ADN decomposition reaction in the condensed zone plays a dominant role in burning at low pressures. The heat feedback from the gas to the surface appeared to be negligibly small. It has been concluded that the reaction of AN dissociation to form NH 3 and HNO 3 controls the ADN burning surface temperature. The three-zone flame structure of the ADN combustion wave has been found, and the main chemical reactions occurring in the zones have been proposed. At low pressures (below 1 MPa), the burning of ADN can be satisfactorily described by a condensed-phase combustion model with the rate-controlling reaction being the ADN decomposition in the melt. A gas-phase model with the rate-controlling reaction being HNO 3 decomposition in the first flame can be used at high pressures (above 10 MPa). In the middle pressure interval, ADN shows combustion instability caused by deficiency of heat produced in the condensed material. In this area the fast but energy-limited heat-release process in the condensed phase has to adapt itself to the slow but energy-rich heat-release process in the gas phase.