Particulate fouling characteristics of different longitudinal vortex generators in pulsating flow channel
When the heat exchanger is working,the medium often contains small impurity particles,which are easily deposited in the channels to form particulate fouling.This paper combines the traditional pulsating flow with the longitudinal vortex generator,and uses numerical simulation to compare and analyze the particulate fouling characteristics of the smooth channel,pulsating flow channel,longitudinal vortex generator channel and pulsating flow combined with longitudinal vortex generator channel,and analyzes the effect of the six different longitudinal vortex generators on the particulate deposition in the pulsating flow combined with longitudinal vortex generator channel in detail.The results show that compare with the fouling resistance of smooth channel,the fouling resistance of the pulsating flow channel and the longitudinal vortex generator channel are reduced by 17％and 22％,respectively,while the combination of the two can be reduced by 45％in the pulsating flow combined with longitudinal vortex generator channel,which indicates that the fouling suppression effect is better after the combination of the two.In addition,comparing the pulsating flow combined with six different longitudinal vortex generators,it is found that the curved longitudinal vortex generator has a better anti-fouling effect than the unbent longitudinal vortex generator of the same type.By comparing with the asymptotic value of the resistance of fouling in the pulsating flow channel,it is found that the anti-fouling effects from low to high are:triangle 12.8％,curved triangle 14.7％,trapezoid 22.0％,curved trapezoid 23.8％,rectangle 29.4％,and curved rectangle 33.0％,among which the curved rectangular longitudinal vortex generator has the best anti-fouling effect.
万方数据
维普
