Dissertation > Excellent graduate degree dissertation topics show

Optimize Air Flow Field of the Melt Blowing Slot Die Via Numerical Simulation and Multi-Objective Genetic Algorithm

Author: LiuBoWen
Tutor: ZengYongChun
School: Donghua University
Course: Textile Engineering
Keywords: Meltblown Numerical Simulation Multi - objective Genetic Algorithms Slot die
CLC: TP18
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
Read: Download Dissertation

Abstract


The slot die widely used in meltblown production . Two stocks in the production process heat jet ejected from the jet holes on both sides , and converge, on the extruded polymer in the nozzle slenderizing . The study of the the slot die velocity field and temperature field helps to understand the mechanism of fiber drawing , in order to guide the the meltblown process optimization design , and thus improve the quality of the product . First, three dimensional numerical simulation using FLUENT 6.3 software, experiment with the meltblown die , and then using a hot-wire anemometer to measure the velocity field and temperature field of the the meltblown slot die . Comparing the measured results with simulation results verify the feasibility of the numerical simulation , and provide a basis for the optimization of the structure parameters . Second , using a combination of methods of numerical simulation and multi-objective genetic algorithm to optimize the structure parameters of the meltblown die , speed and temperature the attenuation minimum meltblown flow field . Optimized data is based on the results of the numerical simulation . Optimized object four main structural parameters of the slot die : gas slot width , angle of the gas tank , the gas tank spacing and nozzle depth . The genetic algorithm is terminated in 50 generations . Finally, the processing optimization results using objective programming method used to obtain the optimal die structure parameters . The data obtained from the optimization process , the smaller the angle of the gas tank and the greater the gas tank width conducive to slow down the speed and temperature of the attenuation . Spacing and the nozzle of the gas tank depth speed and temperature was not significant .

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  21. Numerical Simulation and Experimental Study of Air-Assisted Sprayer of Orchard,S491

CLC: > Industrial Technology > Automation technology,computer technology > Automated basic theory > Artificial intelligence theory
© 2012 www.DissertationTopic.Net  Mobile