Question

y otEhsineering Problem 3 125 points): Water flows out of a upper pontion of the tank is filled with upper portion of the tank to measure the pressure of the gas where h pressurized tank and into the atmosphere as shown in Figure P3 below. The pressurized gas. A U-tube manometer is attached to the 50H cm. The tank has a rectangular cross section as shown in the figure, and the jet has a circular cross section of diameter d 5.08 cm. The losses at the exit of tank (iet) are estimated at 0.5H. The velocit o the free surface is considered negligible compared to the jet velocity. I the time e empty the tank is 1. 5 min, and using the data on the figure, evaluate H. Gas Mercury 3 m Water Topview Jet Figure P3

Answer 1

In Bernoulli equation all pressure considered are Gauge pressure , so pressure at point 1 is considered zero because the point 1 is at atmospheric condition

Substituting the above values we get

After solving we get three roots which are

0.8+0.4823i , 08-0.4823i , 0.2687

Since 0.2687 is the only real value present we take H=0.2687 m

RESULT

H = 0.2687 m