变燃速发射药芯料体积流率波动值的数值模拟

利用POLYFLOW软件,对不同操作条件下变燃速发射药芯料在机筒内的流动情况进行三维数值模拟,对其体积流率波动因素进行研究。结果表明,芯料的体积流率与螺杆转速成正比,不同转速下芯料体积流率高频波动值在0.02%~0.03%之间,芯料的体积流率波动值与螺杆转速波动值成正比关系;芯料的体积流率与入口压力成正比,不同入口压力下体积流率高频波动值为0.024%~0.026%;入口压力波动较大时,芯料的体积流率波动随着入口压力的增大而较快增加。

Numerical Simulation on Fluctuation Value of Volume Flow Rate for the Inside Layer of the Variable-burning Rate Propellant

Three-dimensional flows of variable-burning rate propellant solution in the screw are simulated using the POLYFLOW in different operating conditions. Simulation results indicate that the volume flow rate of core material is directly proportional to the screw velocity. When the screw velocity is different, the high frequency fluctuation values of the volume flow rate are between 0.02% and 0.03%. The fluctuation values of the volume flow rate are directly proportional to the fluctuation values of the screw velocity.The volume flow rate of the core material are directly proportional to the entrance pressure. When the entrance pressure is different, the high frequency fluctuation values of the volume flow rate are between 0.024% and 0.026%. The fluctuation values of the volume flow rate rapidly increase with the entrance pressure increase, when the fluctuation value of entrance pressure is greater.