The Question Is Translated Below Translated 1 (178.5 KiB) Viewed 8 times
The Question Is Translated Below Translated 2 (219.92 KiB) Viewed 8 times
1. El sistema mostrado en la figura inferior debe producir un flujo volumétrico de 40 m/s que se descarga a presión atmosférica. Considere un largo total de 60m de tubería de 100mm de diámetro de acero comercial nuevo. Incluye dos codos roscados ("threaded”) y una válvula. Determine: (a) la velocidad del fluido en la tubería, (b) el número de Re, (c) el factor de fricción f usando la fórmula provista, Determine la altura H que debe tener el nivel de agua en el tanque (1) Para los dos problemas del examen puede asumir 1,000kg/m² para la densidad del agua y para la viscosidad use 10-kg/m.s 1 valve, kv=5 H 2
e(mm) Loss Coefficients for Pipe Components h = K Component K. Pipe Material Glass, drawn brass, copper (new) Seamless commercial steel (new) Commercial steel (enamel coated) Commercial steel (new) Wrought iron (new) Asphalted cast iron (new) Galvanized iron Cast iron (new) Wood Stave (new) Concrete (steel forms, smooth) Concrete (good joints, average) Concrete (rough, visible, form marks) Riveted steel (new) Corrugated metal 0.0015 0.004 0.0048 0.045 0.045 0.12 0.15 0.26 0.18-0.9 0.18 0.36 0.60 0.9 - 9.0 45 Elbows Regular 90°, flanged Regular 90°, threaded Long radius 90°, flanged Long radius 90, threaded Long radius 45°, flanged Regular 45°, threaded 0.3 1.5 0.2 0.7 0.2 0.4 b. 180° return bends 180° return bend, flanged 180° return bend, threaded 0.2 1.5 Friction factor laminar flow 64.0 f = Rep For turbulent flow use the following relationship to find the friction factor: 0.25 f E 5.74 log + 3.7D Rep 0.9 Reentrant (embeded) Ki = 0.8 Sharp edge K = 0.5 Slightly rounded Kj = 0.2 Well rounded Kp = 0.04
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