The structural parameters of two kinds of new mixers:the clearance SK static mixer and adjustable vortex static mixer were optimized by numerical simulation.Moreover

their optimized performance was compared with that of the conventional SK static mixer.The results indicate that

for the clearance SK static mixer

the optimal structural parameter is with width/diameter ratio(W/D)of 0.58.For the adjustable vortex static mixer

the one consists of three-blade vortex generator of which the blades' central angle is120°and the blade's curvature radius is 400 mm has the most great performance.Both the mixing effect of the adjustable vortex static mixer and the clearance SK static mixer are greater than that of the conventional SK static mixer.Furthermore

the mixing ratio of the adjustable vortex static mixer is the fastest.