基于ANSYS Workbench的聚合物熔体孔芯式冷却结构数值模拟及优化
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摘要
提出了一种结构强度大、冷流体流道独立密封的孔芯式冷却结构,采用数值模拟计算分析孔芯直径和孔芯数量两个主要结构参数对熔体冷却均化性能的影响规律,并利用综合评价指标计算得到了一定工艺条件下的最优结构参数值。研究结果表明:与孔芯数量相比孔芯直径对结构冷却均化性能的影响更加显著;适当减小孔芯直径、增大孔芯数量有助于减小孔芯结构的压力损失,提高孔芯结构的冷却均化性能;在固定外形尺寸且10 kg/h产量的工艺条件下,最优化结构参数值为孔芯直径6 mm,孔芯数量12。
The effect of varying the core diameter and the number of cores on the comprehensive performance of a core polymer cooler with large structural strength and independent sealing of cold fluid flow channels have been investigated by numerical simulation. The results show that the effect of varying the core diameter on the pressure drop and heat transfer performance is greater than that of varying the number of cores. Appropriately reducing the core diameter and increasing the number of cores both lead to improvements in the comprehensive performance of the polymer cooler. The optimal structural parameter values for a given external dimension and mass rate of 10 kg/h were obtained; the optimum core diameter was found to be 6 mm and the optimum number of cores was 12.
The effect of varying the core diameter and the number of cores on the comprehensive performance of a core polymer cooler with large structural strength and independent sealing of cold fluid flow channels have been investigated by numerical simulation. The results show that the effect of varying the core diameter on the pressure drop and heat transfer performance is greater than that of varying the number of cores. Appropriately reducing the core diameter and increasing the number of cores both lead to improvements in the comprehensive performance of the polymer cooler. The optimal structural parameter values for a given external dimension and mass rate of 10 kg/h were obtained; the optimum core diameter was found to be 6 mm and the optimum number of cores was 12.
引文
[1] TOMASKO D L,LI H,LIU D,et al. A review of CO2applications in the processing of polymers[J]. Industrial&Engineering Chemistry Research,2003,42(25):6431-6456.
[2] ANTUNES M,VELASCO J I. Multifunctional polymer foams with carbon nanoparticles[J]. Progress in Polymer Science,2014,39(3):486-509.
[3]王宝春,郑威,袁秀梅.泡沫塑料研究进展[J].工程塑料应用,2009,37(10):77-82.WANG B C,ZHENG W,YUAN X M. Research situation of foam plastic[J]. Engineering Plastics Application,2009,37(10):77-82.(in Chinese)
[4] VAN DAM J,JANESCHITZ-KRIEGL H. Temperature measurement and heat transfer in flowing polymer melts[J]. International Journal of Heat and Mass Transfer,1985,28(2):395-406.
[5] DOROUDIANI S,PARK C B,KORTSCHOT M T. Processing and characterization of microcellular foamed highdensity polythylene/isotactic polypropylene blends[J].Polymer Engineering&Science,1998,38(7):1205-1215.
[6] HEUSSER R. Method for the manufacture of foams of low density:US 20150087733 A1[P]. 2015-03-26.
[7] MELLER M,GAUDER F. Extensional flow heat exchanger for polymer melts:EP 2629039 A1[P]. 2013-08-21.
[8]梁冠营.基于ANSYS Workbench的SK型混合器二相流数值模拟研究[J].煤矿机械,2014,35(8):63-64.LIANG G Y. Two-phase flow simulation for SK mixer based on ANSYS Workbench[J]. Coal Mine Machinery,2014,35(8):63-64.(in Chinese)
[9] MINAKOV A V,LOBASOV A S,GUZEI D V,et al.The experimental and theoretical study of laminar forced convection of nanofluids in the round channel[J]. Applied Thermal Engineering,2015,88:140-148.
[10] RAO B B,RAJU V R,DEEPAK B. Estimation and optimization of heat transfer and overall pressure drop for a shell and tube heat exchanger[J]. Journal of Mechanical Science and Technology,2017,31(1):375-383.
[11] HIRSCHBERG S,KOUBEK R,MOSER F,et al. An improvement of the Sulzer SMXTMstatic mixer significantly reducing the pressure drop[J]. Chemical Engineering Research and Design,2009,87(4):524-532.
[12]王翠,信春玲,李庆春,等.数值模拟静态混合器结构对PS/CO2熔体温度的影响[J].塑料,2009,38(6):11-14.WANG C,XIN C L,LI Q C,et al. Effects of numerical simulation in static mixer structure on the temperature uniformity of PS melt containing CO2[J]. Plastics,2009,38(6):11-14.(in Chinese)
[2] ANTUNES M,VELASCO J I. Multifunctional polymer foams with carbon nanoparticles[J]. Progress in Polymer Science,2014,39(3):486-509.
[3]王宝春,郑威,袁秀梅.泡沫塑料研究进展[J].工程塑料应用,2009,37(10):77-82.WANG B C,ZHENG W,YUAN X M. Research situation of foam plastic[J]. Engineering Plastics Application,2009,37(10):77-82.(in Chinese)
[4] VAN DAM J,JANESCHITZ-KRIEGL H. Temperature measurement and heat transfer in flowing polymer melts[J]. International Journal of Heat and Mass Transfer,1985,28(2):395-406.
[5] DOROUDIANI S,PARK C B,KORTSCHOT M T. Processing and characterization of microcellular foamed highdensity polythylene/isotactic polypropylene blends[J].Polymer Engineering&Science,1998,38(7):1205-1215.
[6] HEUSSER R. Method for the manufacture of foams of low density:US 20150087733 A1[P]. 2015-03-26.
[7] MELLER M,GAUDER F. Extensional flow heat exchanger for polymer melts:EP 2629039 A1[P]. 2013-08-21.
[8]梁冠营.基于ANSYS Workbench的SK型混合器二相流数值模拟研究[J].煤矿机械,2014,35(8):63-64.LIANG G Y. Two-phase flow simulation for SK mixer based on ANSYS Workbench[J]. Coal Mine Machinery,2014,35(8):63-64.(in Chinese)
[9] MINAKOV A V,LOBASOV A S,GUZEI D V,et al.The experimental and theoretical study of laminar forced convection of nanofluids in the round channel[J]. Applied Thermal Engineering,2015,88:140-148.
[10] RAO B B,RAJU V R,DEEPAK B. Estimation and optimization of heat transfer and overall pressure drop for a shell and tube heat exchanger[J]. Journal of Mechanical Science and Technology,2017,31(1):375-383.
[11] HIRSCHBERG S,KOUBEK R,MOSER F,et al. An improvement of the Sulzer SMXTMstatic mixer significantly reducing the pressure drop[J]. Chemical Engineering Research and Design,2009,87(4):524-532.
[12]王翠,信春玲,李庆春,等.数值模拟静态混合器结构对PS/CO2熔体温度的影响[J].塑料,2009,38(6):11-14.WANG C,XIN C L,LI Q C,et al. Effects of numerical simulation in static mixer structure on the temperature uniformity of PS melt containing CO2[J]. Plastics,2009,38(6):11-14.(in Chinese)