Experimental Investigation On The Vortex Generator Cas0₄Fouling Characteristic Of Crystallization

For the purpose of research the influence of CaSO₄crystallization foulinggrowth characteristics which vortex generators take to the wall, the investigation isdone by the combination way of experiment and numerical simulation. The analysisis made for the different results which sizes and arrangement of specimens of vortexgenerators caused in the experiments.According to the experimental consideration, the method of research can bedivided into two aspects: first, by experiment. We take an experimental sample every7hours. By using off-line weighing, we can conclude the experimental beforeaftermass difference; second, using vortex generator CaSO₄crystallization fouling modeland taking numerical simulation of deposition of CaSO₄crystallization fouling ofvortex generator, velocity field and shear stress near the wall. Then taking ancomparison between simulation and experimental results, besides, taking velocityfield and shear stress near the wall into account to estimate the impact which the twofactors take to the deposition of CaSO₄crystallization foulingBy experimental investigation, the increasing curve of CaSO₄crystallizationfouling is drawn, which is aim at investigating the influence which the size and thepace arrangement of vortex generators take to the fouling deposition. The amount offouling deposition on the surface is increasing with the adding distance of vortexgenerators pace arrangement, and decreased with the increasing vortex generatorssize.By numerical simulation, we make a comparison about the deposition of CaSO₄crystallization fouling between experiment and numerical simulation, and most of theerror is in15%, which indicate the model is reliable. The distribution of velocity fieldand sheer stress force near the wall is different from the wall without vortex generators. These make a remarkable influence on the deposition of fouling andrestrain the asymptotic value of maximum deposition amount.Each part of work is necessary for study the deposition law and mechanism ofCaSO4crystallization fouling in the channel with vortex generators, and of course, itis obviously helpful for next stage of experiment research.