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-  2018 


DOI: 10.13543/j.bhxbzr.2018.01.011

Keywords: 三维非等温流场,强化传热,径向温度,场协同,
three-dimensional non-isothermal flow fields
,heat transfer enhancement,radial temperature,field synergy

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Abstract:Three-dimensional non-isothermal flow fields in the metering section of different screw structures during the plasticization process have been simulated by using CFD-fluent software, and the differences in velocity field, temperature field, radial temperature distribution, convective heat transfer coefficient and field synergy angle for the different screw structures are discussed. The results show that during the plasticization process, a new type of enhanced heat transfer screw structure affords radial mass transfer, thus enhancing the radial convective heat transfer, and the radial temperature distribution is also improved. Moreover, the new structure has a higher convective heat transfer coefficient and better synergy relationship than the conventional screw structure. The results show that there is a substantial improvement in the convective heat transfer of the screw in the case of the new design.


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