Experimental study on shear heating due to barrel rotation and screw rotation in extrusion
- Clarkson Univ., Potsdam, NY (United States)
This investigation is a continuation of our previous discussion on whether barrel rotation and screw rotation give rise to the same results in the analysis of the extrusion processes. Barrel rotation has been adopted for extrusion analysis for long time. The barrel rotation analysis is still extensively used in numerical analysis for extruder of screw rotation. Here, we provide data which helps to understand the limit for applying the barrel rotation model to predict temperature difference generated by screw rotation. The modern description using drag flow assumptions for extruder analysis started early in this century. Since then, it was developed by a number of researchers. In their analysis, the extruder fluid mechanics was described as barrel induced drag flow which was the driving force causing the fluid to be conveyed towards the die end of the extruder. A new physical concept of extruders characterized by three components, barrel, core and flight was presented three years ago, where the screw was decomposed into core and flight. The theoretical numerical analysis of the energy dissipation has been reported. The experimental comparison of energy dissipation originated by barrel and screw rotations has not previously been reported. This paper details our preliminary efforts on the analysis of temperature change inside extruder during barrel and screw rotations.
- OSTI ID:
- 602843
- Report Number(s):
- CONF-961108--
- Country of Publication:
- United States
- Language:
- English
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