摘要
以10 MW级船舶柴油机U型脱硫塔为研究对象,通过AVL FIRE软件系统开展柴油机废气参数对U型脱硫塔场特性和液滴蒸发特性研究。研究表明,柴油机废气温度对U型脱硫塔温度场分布和喷射动能产生明显影响,但对塔内部的流场分布和液滴分布影响较小,较高的废气温度会导致液滴凝结困难。柴油机废气流量对温度场、流场的分布及水蒸气浓度均产生明显影响,柴油机废气流量越小,喷雾对流场分布的影响越大。较高的废气流量有助于形成旋涡,强化脱硫效果。当U型脱硫塔内部的流场分布稳定时,废气流量对水蒸气浓度的分布影响较小。研究结果可为U型脱硫塔小型化、低压降设计提供理论指导。
The U-shaped desulfurization scrubber of a 10 MW marine diesel engine is taken as the research object,and the effects of diesel engine exhaust gas parameters on the field characteristics and droplet evaporation characteristics of the U-shaped desulfurization scrubber are investigated using the AVL FIRE software system.The research shows that the exhaust gas temperature of diesel engines has a significant effect on the temperature field distribution and injection kinetic energy of the U-shaped desulfurization scrubber,but has a relatively small impact on the flow field distribution and droplet distribution inside the scrubber.Higher exhaust gas temperatures can cause difficulties in droplet condensation.Diesel engine exhaust gas flow has a significant effect on the temperature field,flow field distribution and water vapor concentration.The lower the exhaust gas flow of the diesel engine,the greater the influence of the spray on the flow field distribution.The higher the exhaust gas flow rate,the more a vortex is created,which increases the desulfurization effect.When the flow field distribution inside the scrubber is stable,the effect of the exhaust gas flow rate on the distribution of the water vapor concentration is relatively small.The results can provide theoretical guidance for the miniaturization and low-pressure drop design of U-shaped desulfurization scrubber.
作者
张钊
张闫焜
周松
郭浩
ZHANG Zhao;ZHANG Yankun;ZHOU Song;GUO Hao(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;School of Power and Energy Engineering,Harbin Engineering University,Harbin 150006,China;Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)
出处
《船舶工程》
CSCD
北大核心
2024年第11期75-83,共9页
Ship Engineering
基金
重庆市技术创新与应用发展专项面上项目(2022TIAD-GPX0060)。
关键词
船舶脱硫
数值模拟
场特性
蒸发特性
ship desulfurization
numerical simulation
field characteristics
evaporation characteristic
