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CFD meshing based on the non-parallel type twin screw extruder flow field numerical simulation

DPositioninSystemofCoaiMineUnderground. YUFa a ~ llnDIAUY cricket chugt (CollegeofElectricalandAutomation,[link widoczny dla zalogowanych], HenanPolyt ~ rmicUniversity-Jiaozuo454000-China) Abstract: Wth1 = lledevelopmentofRFIDtechnology, ithaeenappliedinpositioningSystemofmovingobjectofcoal ~ mineunderground. Becauseoftheflequencieslimit, theinteffefencebetweenreaderwriterdevicescausedreaderwriterdevice ~ collisionproblem. Readerwriterdevicescollisionproblemwasanalyzedwithtl Ⅱ situations, andintroducesamethodofpreventingcollisionWaSpresentedinaccordancewithbinary-search-treeofthesearchofbinarysystembasedonTDMA. AndsomeofitsfunctioUSwereanalyzed. Moreover. theperformanceanalysisshowsthatitsatisfyactualapplicationKeywords: positioningofmovingobject; RFID; readingwriterdevice; binary-search-tree; preventingc0l】 isi0n0 introduction of a radio frequency identification technology (RFII)), also known as RFID, is a known, flow rate and inversely proportional to the axial pressure difference. Because axial pressure increases, so the pressure back flow rate increases, thereby reducing the total flow. 050l0015O Lo Hin speed / r. min Figure 6, the theoretical maximum extrusion screw speed and the relationship between the amount of 0 'Die n. . 0-4 beetles 0_2 Nang o00.20.40.60.8 axial pressure / liver a Figure 7 the relationship between axial pressure and flow through the 4 Conclusion non-meshing twin screw extruder screw element of three-dimensional parallel-type flow field analysis, can be drawn: (1) parallel-type screw thread elements in the small gap at the edge of the material has a large pressure gradient and velocity gradient, velocity and pressure curves in the African-contact automatic identification technology. It uses RF (Radio) approach to non-contact two-way communication, to achieve the target identification and data exchange of three maximum values appear in the spiral edge area; (2) non-parallel type of screw element meshing engagement zone dispersion in mixed ability significantly weaker than engagement with the screw element in the mating area, the more material near the center of the intermeshing region the greater the flow rate; (3) the theoretical maximum extrusion and screw rotation is proportional to the amount, flow and pressure difference is inversely proportional to the screw and extruder barrel gap and inversely proportional to the amount; (4) The material in the screw at the edge pressure gradient,[link widoczny dla zalogowanych], velocity gradient is large, so the edge area of the material easy to screw mixing, it can be inferred headed screw is better than single-mixing head screw. References:. [1] TRANSACTIONS, Hu Dongdong. Computational Fluid Dynamics (cFD) and the package in the application of twin-screw extruder [J]. China Plastics,[link widoczny dla zalogowanych], 2001,15 (12) :12-16. [2] I11 ~ Ping, Hu Hanping. Principles of polymer molding and molding technology [M]. Beijing: Chemical Industry Press. 200l_ [3] Ma Xiuqing, Geng Xiao-zheng. Non-Rotating Twin Screw Extruder Screw Elements during regular three-dimensional flow field analysis of isothermal Newtonian flow model [J]. China Plastics, 200O, 14 (10): 79 A S5 Author: Dan Zhaodong (1971 a), Feicheng people. MA, Lecturer,[link widoczny dla zalogowanych], 2OO4 graduated from Liaoning University of Petroleum and Chemical Gas Storage and Transportation Engineering, is engaged in oil and gas storage and transportation, hydraulic machinery and other aspects of teaching and research work,[link widoczny dla zalogowanych], published many articles, a 32-a Received date :2006-07 -27
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