Effects of Structural Parameters on the High-pressure Water Descaling Nozzle Performance

In order to determine the structural parameters of the descaling nozzles and improve the descale effects,The numerical simulation method was used to analyze the effects of the nozzle divergence angle, the depth of inner cone hole, convergence angle on the nozzle spray angle and the volume flow rate. Herein, the orthogonal experiment method was adopted to simulate structural parameters and their interactions of the descaling nozzles and the significance and importance order of influence. Obtained the optimal combination of structural parameters was validated by experiments. The results show that when the divergence angels are increased, the nozzle spray angles will reduce but the volume flow rates will increase. When the depths of inner cone holes are increased, the nozzle jet performance will be comprehensively promoted. When the convergences are increased, the nozzle spray angles and the volume flow rates will be simultaneously reduced. The depths of inner cone holes are significantly correlated to the three factors,the optimal aggregative index may be obtained under the conditions of nozzle divergence angle is 80°, the depth of inner cone hole is 8 mm, the nozzle convergence angle is 65°. Under these conditions, the efficiency of the descaling nozzle performance is mostly improved. The experimental research designed by the optimized parameters show that the nozzle spray angle increases from 35.7° to 44.1° and the volume flow rate increases from 10.17 L/min to 28.3 L/min. © 2018, China Mechanical Engineering Magazine Office. All right reserved.