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Effects of nanoscale fuel additives on properties and non-reacting spray performance of alternative, conventional and blended jet fuels at elevated ambient conditions
Fuel Processing Technology ( IF 7.5 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.fuproc.2020.106436
Kumaran Kannaiyan , AlReem AlDosari , Reza Sadr

Abstract The dispersion of nanoscale metal particles in liquid hydrocarbon fuels, or nanofuels, has recently garnered interest owing to its positive influence on fuel emission characteristics. Physical properties of the fuel are altered due to the addition of nanoparticles, which in turn can affect its atomization, combustion, and emission characteristics. Therefore, a better understanding of the atomization phenomena is essential to recognize its influence on the combustion process. The objective of this work is to investigate the impact of alumina nanoparticles on the non-reacting spray characteristics of conventional Jet A-1, an alternative gas-to-liquid (GTL) fuel, and a 50–50% by-volume blend of these, each at elevated ambient conditions that are relevant to industrial applications. First, the influence of the nanoparticle addition on the fuel properties relevant to atomization is investigated. Then, the macroscopic spray characteristics, such as spray cone angle, liquid sheet dynamics, and liquid sheet velocity, are determined as a function of nanoparticle concentration, fuel type, and ambient pressure. For this purpose, an aviation-based pressure-swirl nozzle is used to generate the fuel spray with nanoparticle weight concentrations at 0, 2%, and 4%. The spray characteristics are measured at different ambient pressures of 100, 500, and 900 kPa, while the ambient temperature is maintained at an elevated 400 K for all the cases. The spray features of the above fuels with and without the dispersion of nanoparticles are compared. The macroscopic spray results demonstrate that the nanoparticle dispersion, even at low concentrations, can affect the spray in the near-nozzle region. The earlier disruption of the liquid sheet occurring with nanofuels indicates the influence of nanoparticles on the spray liquid sheet dynamics. Also, the results show that ambient pressure has a significant effect on the spray features for all three fuels studied.

中文翻译:

在升高的环境条件下,纳米级燃料添加剂对替代、传统和混合喷气燃料的性能和非反应喷雾性能的影响

摘要 纳米级金属颗粒在液态碳氢燃料或纳米燃料中的分散,由于其对燃料排放特性的积极影响,最近引起了人们的兴趣。由于添加了纳米颗粒,燃料的物理特性会发生变化,这反过来又会影响其雾化、燃烧和排放特性。因此,更好地了解雾化现象对于认识其对燃烧过程的影响至关重要。这项工作的目的是研究氧化铝纳米粒子对传统 Jet A-1、一种替代的气液 (GTL) 燃料和 50-50% 的混合物的非反应喷雾特性的影响。这些,每个都在与工业应用相关的升高的环境条件下。第一的,研究了纳米颗粒添加对与雾化相关的燃料特性的影响。然后,宏观喷雾特性,如喷雾锥角、液片动力学和液片速度,被确定为纳米颗粒浓度、燃料类型和环境压力的函数。为此,使用基于航空的压力涡流喷嘴产生纳米颗粒重量浓度为 0、2% 和 4% 的燃料喷雾。喷雾特性是在 100、500 和 900 kPa 的不同环境压力下测量的,同时环境温度在所有情况下都保持在 400 K 的升高。比较了有和没有纳米颗粒分散的上述燃料的喷雾特性。宏观喷雾结果表明纳米颗粒分散体,即使在低浓度下,会影响喷嘴附近区域的喷雾。纳米燃料发生的液体层较早的破坏表明纳米颗粒对喷雾液体层动力学的影响。此外,结果表明环境压力对所研究的所有三种燃料的喷雾特性都有显着影响。
更新日期:2020-11-01
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