三角翼涡流发生器纳米氧化镁颗粒污垢特性  

Characteristics of nanometer magnesia particulate fouling of delta wing vortex generator

作　　者：徐志明[1] 杨苏武 朱新龙[1] 张一龙[2] 刘坐东[2] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012 [2]华北电力大学,北京102206

出　　处：《化工学报》2015年第1期86-91,共6页CIESC Journal

基　　金：国家自然科学基金项目(51076205)~~

摘　　要：为了探究三角翼涡流发生器的纳米氧化镁颗粒污垢特性,选用粒径为50 nm的氧化镁颗粒配制的胶体溶液为研究对象,研究了在不同水浴温度、颗粒浓度、流速、三角翼间距以及不同布置等工况下三角翼涡流发生器的污垢特性。结果表明:三角翼涡流发生器具有抑垢特性,水浴温度、浓度、流速对其抑垢能力及结垢速率均有影响,水浴温度升高、颗粒浓度降低以及工质流速升高都会导致三角翼的抑垢能力增强。三角翼不同列间距的抑垢能力随着布置方式的改变而改变,采用均匀分布布置形式时40 mm列间距的抑垢能力最强,而采用同列数布置时80 mm列间距的抑垢能力最强。In order to explore the characteristics of nanometer magnesia particle fouling in delta wing vortex generator, colloidal solutions made of magnesia particles of 50 nm were used in the experiments. The fouling characteristics of the delta wing vortex generator under different conditions were investigated, including water bath temperature, particle concentration, flow velocity, spacing and arrangement of delta wings. The results show that the delta wing vortex generator can inhibit the fouling. The longitudinal vortex and stagnation zone produced by delta wing vortex generator and the characteristics of magnesia colloidal solution have a great influence on the fouling characteristics. Higher water bath temperature, lower magnesia solution concentration, and higher flow velocity can reduce the fouling rate. The fouling characteristics also depend on the arrangement of delta wings, which results in different longitudinal vortexes. With the uniform layout of delta wings, 40 mm spacing is the best for inhibition of dirt. With the same number of columns, 80 mm spacing is the best.

关 键 词：三角翼 氧化镁 结垢 污垢特性 间距 胶体 纳米粒子 

分 类 号：TK124[动力工程及工程热物理—工程热物理]