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.