myraa0132
06.05.2020 •
Engineering
El modelo de un barco de escala se va a construir en un laboratorio.
a) Determinar la velocidad a la que debe moverse el si el tiene una velocidad de
b) Determinar la fuerza de resistencia al movimiento que se producirá en el si en el
se miden
c) Calcular la potencia que debe proporcionarse a la flecha de la hélice, si la eficiencia de la misma es
del . Determinar en
datos:
1:50; a) modelo, prototipo, 19.9 yd/s; b) modelo, prototipo, 21846 kg; c) 77 %, CV
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Ответ:
the maximum height h to which the the water steam could rise is 40.65m
Explanation:
Given;
= 20m,
= 2atm ≈ 20265 N/m
Density of water ρ = 1000 kg/
Note: we take point 1 at the free surface of the water in the tank and point 2 at the top of the water trajectory. we also take reference level at the bottom of the tank.
fluid velocity at the free surface of tank is very low ( ≅ 0) and at the top of the water trajectory = 0
Step 1: Applying Bernoulli equation between poin 1 and point 2
/ρg + /2g + = /ρg + /2g +
/ρg + = /ρg +
= ( - )/ρg +
Substituting values into we have,
=