同向双螺杆间隙对含能材料加工过程的影响研究

Influence of co-rotating twin screw clearance on the processing of energetic materials

为研究螺杆间隙对流道中药浆的安全性能和混合效果的影响,在螺杆构型相同的情况下,设置1.2、1.6 mm和2.0 mm 3种不同的螺杆间隙,建立非等温流场模拟模型,用模拟计算得到的压力、温度和剪切应力来评价流道中药浆的安全性能,用加权平均剪切应力和累积停留时间分布来评价螺杆的分散混合和分布混合能力。结果表明:随着螺杆间隙的增大,流道中药浆的安全性提高,混合效果变差。

In order to study the effect of screw clearance on the safety performance and mixing of an energetic material slurry in a fluid,screw clearances were set as 1.2 mm,1.6 mm and 2.0 mm,with all other conditions remaining fixed.A non-isothermal flow field simulation model was established.The pressure,temperature and shear stress were calculated by simulation and used to evaluate the safety performance of the energetic material slurry in the fluid.The weighted average shear stress and cumulative residence time distribution are used to evaluate the dispersive mixing and distributed mixing capabilities of the screw.The results show that with increasing screw clearance,the safety performance of the energetic material slurry in the fluid is improved,but the mixing becomes poorer.