Computational fluid dynamic simulations in thermal waste treatment technology—Design, optimisation and troubleshooting

Numerical and experimental study of pulse-jet cleaning in fabric filters

“…For high resistance bags, maximum pulse pressure was obtained with venturi and vice versa. The venturi 65 role was also studied by Hájek [11], who found a three-fold increase in the mass flow rate entering the bag when installing a venturi, claiming increased entrainment of secondary air to be the reason. Further, a two-fold increase in pulse pressure was found, demonstrating the unambiguous advantage of the venturi.…”

“…Lo et al [7] studied pulse-jet cleaning of a single pleat in a pleated fabric cartridge by CFD. As in the study by Hájek [11], the geometric simplification 85 enforces axial symmetry disregarding the possible axial misalignment between the jet and venturi/bag. Unsteady RANS with the k-ε turbulence model was adopted and isothermal flow assumed despite the non-negligible Mach number and hence the potential cooling due to expansion.…”

“…Hájek [11] studied the role of the venturi by using a simplified CFD model consisting of a single bag and straight-bore nozzle with and without ven-…”

Design of pulse-jet systems for milk powder baghouses

“…The entrainment of secondary air into the pulse jet makes an important contribution to the pulse cleaning effectiveness [11,17]. A free circular jet entrains surrounding air at a rate of 15-25% of the initial mass flow per nozzle diameter of distance [8].…”

Conventional versus specific types of heat exchangers in the case of polluted flue gas as the process fluid – A review

“…An improvement of about 10 % in terms of maximum velocity magnitude has been obtained with the manual optimization approach [33]. First results from the computational optimization show that further improvement by 8 % is still possible [34].…”