关键词: 混沌转子, 球形氧化铝, 热导率, 力学性能, 转子构型

Abstract: Models for chaos rotors and standard rotors are established by a Polyflow software. Effects of rotor configuration and rotor speed on dispersive and distributive mixing capabilities were investigated through mixing index, cumulative deagglomerating energy and Lyapunov index of flow fields. ABS/Al2O3 composites were also prepared to study effects of particle size, rotor structure and mixing process on their thermal conduction. The results indicated that a better dispersion could be achieved by using the chaotic rotors and increasing rotating speed. Composites containing 70 wt % of Al2O3 achieved the maximum thermal conductivity and mechanical properties when the chaotic rotor was used at a rotating speed of 500 r/min, and the thermal conductivity reached 1.3 W/(m·K). In addition, the addition of graphite fiber could improve thermal conductivity of the composites, and the thermal conductivity reaches 2.1 W/(m·K) when 65 wt % of Al2O3 and 5 wt % of graphite fiber were incorporated.

Key words: chaos rotor, spherical alumina, thermal conductivity, mechanical property, rotor configuration