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Ejercicios resueltos sobre mecánica de fluidos guía completa

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Una detallada guía sobre ejercicios resueltos del tema de mecánica de fluidos que te ayudaran a aprender mas a fondo el tema.

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Uploaded on
November 7, 2022
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Written in
2021/2022
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MECÁNICA DE FLUIDOS. PROBLEMAS RESUELTOS

1. Por la tubería horizontal representada en la figura circula agua. El diámetro de las secciones 1 y 3
es Ø = 20 cm, reduciéndose en la sección 2 a la mitad. Considere g = 10m/s2.


1 2 3


a) Ordenar presiones y velocidades en los puntos 1,2,3 de mayor a menor
b) Calcular el caudal, expresado en litros por segundo, si la diferencia de presiones entre ambas
secciones es 0,3 kp/cm2
c) Representar la línea de altura total y la línea de altura piezométrica cuando la presión en la
sección ancha es 1kp/cm2
RESOLUCIÓN
a) Considerando el agua como un fluido ideal, se cumple: P1=P3>P2; v1=v3<v2

b) Considerando la diferencia de presión:
Teniendo en cuenta que: 1,033 atm. técnica = 10,33 m.c.a, resulta
Ecuación de continuidad , de donde:
Teorema de Bernoulli para tubería horizontal z1 = z2 = z3 = 0,1 m




El caudal es:

c) Línea de Altura Total, teniendo en cuenta que




10,3 m LAT
10,1 m LAP
7,1 m




1 2 3
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