Calculation of the jet velocity:
\(V1 = \sqrt{2P1/p}\)
with:
- P1 the manifold pressure in Pa (1 bar = 100 000 Pa) and V1 in m/s - p = water density at room temperature = 998,2 kg/m3
Calculation of the transferred energy by waterjet:
\(E = {3,1415pd^2CdV^3 \over 8}\)
d = orifice of the capillary section in m
Cd = discharge coefficient
E = energy rate in J/s
Specific energy is calculated based on the following formula:
SE (J/kg fabric) = E / M
M = massflow rate of the fabric in Kg/s and is calculated as follows:
M = Samplewidth (M) * Basisweight (kg/m²) * Bettspeed (m/s)
1557