液滴破碎和表面张力对固体火箭发动机喷管机械腐蚀的影响

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-02-24 DOI:10.1115/1.4056995
Mohamed Abousabae, R. Amano
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引用次数: 0

摘要

固体推进剂喷嘴的腐蚀预测对其设计过程至关重要。这种侵蚀是由聚集的铝/氧化铝颗粒撞击喷嘴壁引起的。因此,基于欧拉-拉格朗日方法建立了一个多相数值模型,以模拟燃烧室内燃烧的铝颗粒,并模拟喷嘴的机械侵蚀。根据文献中的数值和实验结果对数值模型进行了验证。然后,由于铝颗粒没有到达喷嘴,因此消除了铝颗粒燃烧过程,从而简化了流程。简化模型将进一步用于模拟团聚体的破碎,并预测表面张力较低的铝颗粒的机械侵蚀。结果表明,应用Reitz-Diwakar破碎模型,根据注入液滴的不同,侵蚀率降低了6.2%-24%。此外,发现通过将铝添加剂的表面张力降低15%可以实现侵蚀率降低1%至4.5%。
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Mechanical Erosion Investigation in Solid Rocket Motor Nozzle Through Droplet Breakup and Surface Tension Influence
Erosion prediction of the solid propellent nozzle is vital for its design process. This erosion is caused by the impingement of agglomerated aluminum/aluminum oxide particles on the nozzle walls. Thus, a multi-phase numerical model is established based on the Eulerian-Lagrangian approach to model the aluminum particles burning inside the combustion chamber and simulate the mechanical erosion of the nozzle. The numerical model is validated against numerical and experimental results from the literature. Then it is simplified by eliminating the aluminum particles burning process as they do not reach the nozzle. The simplified model will be further used in modeling the agglomerates' breakup and predicting the mechanical erosion for aluminum particles with lower surface tension. The results showed that applying the Reitz-Diwakar breakup model reduces the erosion rate by 6.2% - 24% depending on the injected droplets. In addition, it was found that a decrease in the erosion rate by 1% to 4.5% can be achieved by reducing the aluminum additive's surface tension by 15%.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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