摘要
添加纳米颗粒可以加速柴油的蒸发氧化速率,从而提高柴油的有效热效率。本研究探讨了0.5%质量分数下纳米铝颗粒(Al NPs)、碳纳米管(CNT)对柴油蒸发特性的影响。试验发现,Al NPs和CNT都会加速柴油的蒸发,温度低于573 K时,Al NPs与CNT对柴油的影响程度相近,将柴油的蒸发时间缩短为原来的60%~70%,而温度超过573 K时,Al NPs的影响程度保持不变,但CNT将柴油的蒸发时间缩短为10%~20%。此外,Al NPs与CNT对柴油蒸发形式的影响也不相同:Al NPs通过加速平稳蒸发来加速蒸发,CNT通过引发波动蒸发来加速蒸发,且Al NPs-柴油只会在高温大体积下发生波动蒸发,以喷射形式为主,而CNT-柴油在低温小体积下也会发生波动蒸发,以微爆形式为主。
Adding nanoparticles to diesel can improve the evaporation and oxidation rate of diesel fuel,and the effective thermal efficiency of diesel also increase accordingly.The effects of nano aluminum powder(Al NPs)and carbon nanotubes(CNT)on diesel evaporation characteristics were studied at a concentration of 0.5%.Experiments demonstrated that both Al NPs and CNT accelerated diesel evaporation.At temperatures below 573 K,the impacts of Al NPs and CNT on diesel were similar,reducing the evaporation time of diesel to 60%-70%of its original value.However,at temperatures exceeding 573 K,the influence of Al NPs remained unchanged,but CNT shortened the evaporation time of diesel to 10%-20%of pure diesel.In addition,Al NPs and CNT had different evaporation forms for diesel.Al NPs accelerated evaporation by accelerating smooth evaporation,CNT accelerated evaporation by inducing fluctuating evaporation.Notably,fluctuating evaporation in Al NPs-diesel occured primarily under high-temperature and large-volume conditions,manifesting as jet-like jection.In contrast,fluctuating evaporation in CNT-diesel was observed even at low temperatures and small volumes,predominantly through micro-explosions.
作者
孔令斐
马富康
王驰宇
徐锐凡
陈宇翔
张凯
KONG Lingfei;MA Fukang;WANG Chiyu;XU Ruifan;CHEN Yuxiang;ZHANG Kai(School of Energy and Power Engineering,North University of China,Taiyuan 030051,China)
出处
《车用发动机》
北大核心
2026年第1期9-14,共6页
Vehicle Engine
关键词
燃料添加剂
纳米颗粒
碳纳米管
蒸发特性
fuel additive
nanpartide
carbon nantube
evaporation characteristics
