Given: installation (shown in the diagram), all sizes a

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Given: installation (shown in the diagram), all sizes a

Given: installation (shown in the diagram), all sizes are given;
The density of the liquid is 1036.3 kg / m3;
The kinematic viscosity of the liquid is 0.054 cm2 / s;
The pressure in the cross section 0-0 is equal to atmospheric;
The pressure in section 5-5 is equal to atmospheric.

It has been experimentally measured that the flow rate at the exit from the needle will be equal to:
 - maximum 45 mg / s;
 - minimum 39 mg / s;
 - average 42 mg / s.

To establish the dependence of all possible pressure losses with the flow rate, provided that the fluid flow rate as close as possible corresponds to the measured flow rate.
 


Given: Mmax = 45 mg / s = 45 * 10-6 kg / s; Msr = 42 mg / s = 42 * 10-6 kg / s; Mmin = 39mg / s = = 39 * 10-6kg / s; ρ = 1036.3 kg / m3; υ = 0.054 cm2 / s = 5.4 * 10-6 m2 / s; p0 = p6 = rat = 105 Pa; D = 20mm = 20 * 10-3m; d1 = 5mm = 5 * 10-3m; d2 = 1.5mm = 1.5 * 10-3m; d3 = 4.9mm = 4.9 * 10-3m; d4 = 1.5mm = 1.5 * 10-3m; d5 = 0.67mm = 0.67 * 10-3m; L = 410mm = 0.41m; l1 = 18mm = 18 * 10-3m; l2 = 6mm = 6 * 10-3m; l3 = 7mm = 7 * 10-3m; l4 = 14mm = 14 * 10-3m; l5 = 15mm = 15 * 10-3m.

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