Optimization of air flow field of the melt blowing slot die via numerical simulation and genetic algorithm

2010 ◽  
Vol 115 (3) ◽  
pp. 1540-1545 ◽  
Author(s):  
Yafeng Sun ◽  
Xinhou Wang
Keyword(s):  
Numerical Simulation ◽  
Genetic Algorithm ◽  
Flow Field ◽  
Air Flow ◽  
Melt Blowing ◽  
Slot Die

scholarly journals Optimal design for the dual slot die in melt blowing process

2014 ◽  
Vol 18 (5) ◽  
pp. 1714-1715
Author(s):  
Li-Li Wu ◽  
Ting-Ting Cheng ◽  
Chuan Xu ◽  
Ting Chen
Keyword(s):  
Experimental Design ◽  
Optimal Design ◽  
Flow Field ◽  
Design Method ◽  
Air Flow ◽  
Variance Analysis ◽  
Orthogonal Experimental Design ◽  
Melt Blowing ◽  
Experimental Design Method ◽  
Slot Die

The parameters of the dual slot die in an industrial melt blowing equipment are designed optimally using the orthogonal experimental design method. The air flow fields of different die parameters are simulated. Effects of the die parameters are analyzed using variance analysis. The results show that the inset distance and slot width have significant effects on the air flow field while effect of the slot angle is unremarkable.

Fiber spinning with airfields enhanced by airfoil louvers

2018 ◽  
Vol 89 (15) ◽  
pp. 3150-3158
Author(s):  
Kayla A Foley ◽  
Robert L Shambaugh
Keyword(s):  
Flow Field ◽  
Air Flow ◽  
Research Work ◽  
Fiber Spinning ◽  
Polymer Fiber ◽  
Air Flow Rate ◽  
Air Velocity ◽  
Melt Blowing ◽  
Slot Die ◽  
Spinning Process

Airfields are used in common polymer fiber spinning processes, such as melt blowing and spunbonding. A pair of louvers was installed in the air flow field of a melt blowing slot die. Previous research work has shown that, with louvers in place, the air velocity along the fiber threadline is higher than the velocity when louvers are not used. Since the air velocity is what drives the spinning process, the presence of louvers was expected to increase the attenuation of the molten filaments and thus improve the melt blowing process. Melt blowing runs were made with variable louver size (chord), louver separation, louver distance from the die face, the angle of the louvers relative to the die face, and air flow rate. Fibers were collected and fiber diameters were measured.

scholarly journals Polymer drawing in the unsymmetrical air flow of melt blowing: Numerical simulation

2014 ◽  
Vol 18 (5) ◽  
pp. 1699-1700
Author(s):  
Li-Li Wu ◽  
Yao Ma ◽  
Hua-Jun Chen ◽  
Ting Chen
Keyword(s):  
Numerical Simulation ◽  
Air Flow ◽  
Research Direction ◽  
Transverse Displacement ◽  
Melt Blowing ◽  
Slot Die

The unsymmetrical air flow of the dual slot die in the melt blowing process is simulated. The diameter and transverse displacement of the threadline are obtained numerically. The result shows that the threadline diameter in the unsymmetrical air flow is larger than that in the symmetrical one. This paper helps to point out the research direction for producing finer melt blown fibers.

scholarly journals Computation and measurement of air temperature distribution of an industrial melt blowing die

2014 ◽  
Vol 18 (5) ◽  
pp. 1705-1706
Author(s):  
Li-Li Wu ◽  
Dong-Hui Huang ◽  
Chuan Xu ◽  
Ting Chen
Keyword(s):  
Temperature Distribution ◽  
Flow Field ◽  
Temperature Measurement ◽  
Air Temperature ◽  
Measurement System ◽  
Air Flow ◽  
Melt Blowing ◽  
Air Temperatures ◽  
Slot Die ◽  
Temperature Measurement System

The air flow field of the dual slot die on an HDF-6D melt blowing non-woven equipment is computed numerically. A temperature measurement system is built to measure air temperatures. The computation results tally with the measured results proving the correctness of the computation. The results have great valuable significance in the actual melt blowing production.

Experimental Investigation into a New Melt-Blowing Die for Dual Rectangular Jets

2014 ◽  
Vol 945-949 ◽  
pp. 270-273 ◽  
Author(s):  
Yu Dong Wang ◽  
Xin Hou Wang
Keyword(s):  
Experimental Investigation ◽  
Flow Field ◽  
Air Flow ◽  
Hot Wire ◽  
Melt Blowing ◽  
Important Impact ◽  
Slot Die ◽  
Online Measurements ◽  
Turbulent Air Flow

In this work, online measurements of turbulent air flow field in the melt-blowing process for the slot die with inner stabilizing pieces and the corresponding blunt die were carried out with a hot-wire anemometer. The experiment results reveal that the inner stabilizing piece has an important impact on the flow field below the die face. The new modified die is aerodynamically superior, should contribute to produce much finer melt-blowing fibers and require less energy than the corresponding blunt die.

Investigation into the effect of the angle of dual slots on an air flow field in melt blowing via numerical simulation

e-Polymers ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 337-342 ◽  
Author(s):  
Xin Sanfa ◽  
Wang Xinhou
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Boundary Conditions ◽  
Geometric Model ◽  
Air Flow ◽  
Air Velocity ◽  
Melt Blowing ◽  
Temperature Distributions ◽  
Velocity Pressure

AbstractThe effect of the angle of dual slots on an air flow field in melt blowing was researched via numerical simulation. Through establishing the geometric model of air flow field in melt blowing with dual slots, meshing, designating the boundary conditions and their parameters and numerical simulation, the result illustrates the influence of the angle of dual slots on the variations of air velocity, pressure and temperature distributions. Higher peak values of air velocity, pressure and temperature are obtained with larger angles of dual slots near the die, while only a few differences of these parameters are detected away from the die. Our results demonstrate the angle of 70° is the appropriate one that can produce the finest fibers.

Effects of the die Parameters on the Air Flow Field from a Dual Slot Melt Blowing Die

2011 ◽  
Vol 332-334 ◽  
pp. 1347-1351
Author(s):  
Xu Chuan ◽  
Li Li Wu
Keyword(s):  
Flow Field ◽  
Field Model ◽  
Air Flow ◽  
Jet Flow ◽  
Melt Blowing ◽  
Mean Velocity ◽  
Air Jet ◽  
Slot Die ◽  
The Mean

In this paper, the air jet flow field model for the dual slot die is established. The flow field from the blunt die was found to exhibit that as the jet angle becomes sharper, width of the die slot and distance between the inside edges of both jets more narrow, the mean velocity under the die increases.

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