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Table 1 Typical temperature, velocity and length values in the considered rotational spinning process, cf

From: Fluid-fiber-interactions in rotational spinning process of glass wool production

 

Temperature

Velocity

Diameter

Burner air flow in channel

T air 1 1,773 K

V air 1 1.2102 m/s

W 1 1.010−2 m

Turbulent air stream at injector

T air 2 303 K

V air 2 3.0102 m/s

W 2 2.010−4 m

Centrifugal disk

T melt 1,323 K

Ω 2.3102 1/s

2R 4.010−1 m

Glass jets at spinning holes

θ 1,323 K

U 6.710−3 m/s

D 7.410−4 m

  1. There are M = 35 spinning rows, each with N = 770 nozzles. The resulting 26,950 glass jets are stretched by a factor 10,000 within the process, their slenderness ratio is δ ≈ 10−4.
. Figures 1 and 2.