Numerical analysis of three-dimensional flow field inside drilled-chamber of hydroentangling machine

The effects of chamber structure parameters on the three-dimensional flow performances of high pressure drilled-chamber of hydroentangling machine are investigated by numerical analysis method.The results show that the distribute hole diameter(d1),balance bar diameter(d2) and outflow slot height have significant effect on outflow velocity in cross-direction,average outflow velocity and static pressure.According to the results,it is concluded that d1 = 4 mm and d2 = 30 mm are the critical values of distribute hole diameter and balance bar diameter respectively.There might be backflow in the outflow surface when d1 is smaller than 4 mm or d2 is larger than 30 mm.The proper value for the distribute diameter(d1) is ranging from 6 mm to 10 mm.The proper value for the balance bar diameter is in a range from 25 mm to 30 mm,and the proper value for outflow slot height is 40 mm.