Numerical Simulation And Experimental Study On Spray Flow Field Of Multiple Injection Beams

Temper rolling is an important part of cold-rolled strip steel. In the process of temper rolling, emulsion is ejected in to the gap between work roll and strip steel to ensure efficient lubrication and the great quality of strip steel. In engineering, if nozzles are unsuitable it will lead to uneven distribution, interfere with each other, blind area, vortex,splashed etc. So it affect the lubrication and waste the emulsion. In order to improve the method of spraying and lubrication it is necessary to analysis the spray flow field of multiple injection beams and layout of the nozzles.The main research contents are as follows:First of all, the nozzle with complex structure and stepped holes was measured and physical model of single nozzle flow field was established. Grids were meshed by Gambit. Numerical simulation is conducted by fluent.Second, When emulsion is ejected to the back-up roll, if nozzles spacing is too large or too small the blind area will appear on back-up roll or emulsion will interfere with each other. For that problems numerical simulation of spray flow field of different spacing and rotation angle is conducted by Fluent.Again, the influence of different factors on spray flow field is studied. Numerical simulation is conducted by means of orthogonal design to make sure the quantity of emulsion as little as possible and the quantity of emulsion between work roll and strip steel as much as possible. According to the analysis, the good method of spraying is found out.Finally, set up the experimental platform and do experimental study on it.Establishing five models to observe the impacts on the distribution of the emulsion.Simulation result is compared with experiment results to verify the accuracy of the simulation.