利用有限元法,采用三维非等温、非牛顿流体模型,对三角形排列三螺杆挤出机内聚合物的温度分布进行了数值模拟.在此基础上,考虑了粘性耗散生热的影响,计算了三角形排列三螺杆挤出机功耗特性,研究了螺杆转速、螺纹头数、压力差和挤出量等参数对三螺杆挤出机挤出功耗和功耗比的影响,并和"一"字型排列三螺杆挤出机和双螺杆挤出机进行了比较.结果表明,在相同的操作条件下,三角形排列三螺杆挤出机的混合性能和功耗比均好于"一"字型排列三螺杆挤出机和双螺杆挤出机.
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